Sample Collection Method Context(MethodIdentifierContext) 1170 21GPBCH 21GPBCH - Grand Portage Beaches (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2350 501CTHREE 501CTHREE (Volunteer) 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 459 AWRL A.W. Research Laboratories, Inc. 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1310 AFS AFS (NATIONAL) 2021-03-12T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 283 21AWIC ALABAMA DEPT. OF ENVIRONMENTAL MANAGEMENT - WATER QUALITY DATA 2026-08-17T08:50:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 932 21FLAMEC_WQX AMEC 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1295 ANS-PCER ANS-PCER (NATIONAL) 2021-03-27T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 29 21FLAW_WQX AQUIFER WATCH 2025-11-18T14:01:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1144 AZDEQ_GW AZDEQ_GW 2026-08-25T17:02:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1145 AZDEQ_SW AZDEQ_SW 2026-08-25T11:11:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1063 AZDEQ_WPD AZDEQ_WPD 2026-08-24T12:45:12 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1264 ABSHAWNEE Absentee Shawnee Tribe of Oklahoma (Tribal) 2023-08-09T17:26:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 108 ARR Adams Rib Ranch (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 17 ADVENTURESCIENTISTS Adventure Scientists (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 341 ACBCI_WQX Agua Caliente Band of Cahuilla Indians of the Agua Caliente Indian Reservation, California (Tribal) 2026-01-28T13:10:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1296 ANSP Air Navigation Service Provider (NATIONAL) 2021-03-27T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3990 AQS Air Quality System 2023-12-20T14:09:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 473 AK-CHIN_WQX Ak-Chin Indian Community (Tribal) 2026-08-20T17:53:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 757 21ALBCH Alabama Department of Environmental Management 2025-12-09T11:26:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1312 ADEM Alabama Department of Environmental Management (NATIONAL) 2021-03-12T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3950 AWW_WQX Alabama Water Watch 2026-08-19T11:03:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 130 ALABAMACOUSHATTATRIBE.TX_WQX Alabama-Coushatta Tribe of Texas (Tribal) 2024-12-31T15:26:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 686 21FLACEP_WQX Alachua County Environmental Protection Department (Florida) 2025-10-06T15:02:27 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 103 ARWRF Alamosa River Watershed Restoration Foundation (ARWRF) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 57 AWQDECJN_WQX Alaska Department of Environmental Conservation 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 487 21AKBCH Alaska Department of Environmental Conservation (BEACH) 2026-03-16T14:04:56 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1016 AKDECSPAR Alaska Department of Environmental Conservation, SpillPrevention and Response 2023-05-18T07:11:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1018 AKDFGSPF Alaska Department of Fish and Game - Sport Fish 2021-10-12T12:32:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1019 AKDNRFOR Alaska Department of Natural Resources, Forestry 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1017 AKDECWQ Alaska Dept of Environmental Conservation - Water Quality 2026-06-24T14:07:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1236 ADGGS Alaska Division of Geological & Geophysical Surveys 2025-07-17T23:45:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 959 AKDECAKMAP Alaska Monitoring and Assessment Program 2023-10-12T14:31:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 201 ALASSWCD_WQX Alaska Soil and Water Conservation District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5790 AMAFCA Albuquerque Metropolitan Arroyo Flood Control Authority 2026-05-27T23:18:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 709 ALO_WQX Alliance For A Living Ocean 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 948 ALLARM Alliance for Aquatic Resource Monitoring (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1098 A4GL_WQX Alliance for the Great Lakes (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5611 AMRW Alliance for the Mystic River Watershed 2026-04-30T22:41:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 422 AFW_PDX Amec Foster Wheeler (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1054 ALS_WQX Americal Littoral Society (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 429 AIEO American Indian Environmental Office (Tribal) 2023-08-09T17:26:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3091 ALS-SJ American Littoral Society (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 113 21AS_WQX American Samoa Environmental Protection Agency 2024-06-04T04:16:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 70 ASEPA_WQX American Samoan EPA 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1302 ASTM American Society for Testing and Materials (NATIONAL) ASTM 2021-03-11T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 809 AWC_WQX American Water Company (Illinois) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5510 AMIGOSBRAVOS_WQX Amigos Bravos (Volunteer) 2025-08-25T18:09:33 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 811 ARWWRRI_WQX Anacostia River Watershed Water Resources Research Institute (Volunteer)* 2025-08-18T15:52:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1061 ANCHORQEA Anchor QEA, LLC (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 498 ARSG Animas River Stakeholders Group (Colorado) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 447 ANIMASWP Animas Watershed Partnership (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 671 ANTIX_WQX Antietam National Battlefield 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 571 APPLEGATE_WC Applegate Partnership & Watershed Council (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1282 Applegate WC Applegate WC (NATIONAL) 2021-03-27T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4435 ARCADISNY Arcadis of New York 2024-03-14T12:12:18 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6051 AZDEQ_SP Arizona Department of Environmental Quality (ADEQ) Surface Protection 2026-07-22T14:45:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 711 21ARIZGW_WQX Arizona Department of Environmental Quality (Ground water) 2024-07-15T20:31:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6032 ADA_WQX Arkansas Department of Agriculture 2026-07-02T14:47:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1177 ARDEQH2O_WQX Arkansas Department of Environmental Quality 2026-08-22T07:01:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4250 ARKANSASE&E Arkansas E&E 2024-02-05T11:09:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 102 AHRA Arkansas Headwaters Recreation Area (AHRA) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 942 ASUERF Arkansas State University Ecotoxicology Research Facility 2025-10-01T14:49:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1202 AWRC Arkansas Water Resources Center 2026-07-17T15:53:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 98 ASHCREEKCONSERVATIONASSOC Ash Creek Conservation Association 2026-06-30T07:14:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1039 ASPECT_WQX Aspect Consulting - Bainbridge Island - Seattle - Wenatchee - Yakima 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 981 FORTPECK Assiniboine & Sioux Tribes Fort Peck Indian Reservation (MT) (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4850 APCC_WQX Association to Preserve Cape Cod (Volunteer) 2025-01-27T11:51:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2450 ABCI_WQX Augustine Band of Cahuilla Indians (Tribal) 2025-10-20T10:57:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5290 AUSABLECENTER Ausable Freshwater Center 2025-05-08T07:21:16 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 193 21FLAVON_WQX Avon Park Air Force Range - 23 WG DET 1 OLA 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 512 BLM_WRBBD BLM Wind River/Bighorn Basin District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 817 BLR_WQX BLUELAKERANCHERIA_WQX (Tribal) 2024-10-16T07:38:27 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 231 DWH_SCRIBE1082 BP Deep Water Horzon Oil Spill 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 823 21FLBABR_WQX Babcock Ranch (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 553 BACKBAYNWR Back Bay National Wildlife Refuge 2021-11-08T14:54:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1164 BADRIVER_WQX Bad River Band of the Lake Superior Tribe of Chippewa Indians of the Bad River Reservation, Wisconsin (Tribal) 2026-03-27T13:04:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1265 21BRBCH Bad River Natural Resources Department (Tribal) (BEACH) 2026-01-28T12:53:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5151 BANTAMLAKE_WQX Bantam Lake Protective Organization (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1227 BBP_WQX Barnegat Bay Partnership (Volunteer) 2023-09-13T12:03:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 500 BLMRW Barr Lake Milton Reservoir Watershed (Colorado) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 181 BATTELLE_NFTDR_WQX Battelle 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1231 BATTELLE_NOR_WQX Battelle 2026-08-06T09:32:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 333 BMIC_WQX Bay Mills Indian Community, Michigan (Tribal) 2026-04-21T09:54:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 241 BCHMI_WQX Beaches Program/OST Michigan 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 706 BEAR_CRK_WQX Bear Creek Reservoir (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 351 BRB Bear River Band of the Rohnerville Rancheria, California (Tribal) 2023-08-09T17:26:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6191 BENTONPAIUTE_WQX Benton Paiute Tribe 2026-08-20T09:05:28 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5770 BERNCO_WQX Bernalillo County Natural Resource Services (New Mexico) 2026-02-17T18:53:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 440 BERRY Berry Petroleum Company 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 499 BIGDRY Big Dry Creek Watershed Association (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 604 BIGLAG_WQX Big Lagoon Rancheria, California (Tribal) 2023-08-09T17:26:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 453 BIGPINEPAIUTE Big Pine Paiute Tribe of the Owens Valley (Tribal) 2023-08-09T17:26:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 134 BIGSANDY Big Sandy Rancheria of Western Mono Indians of California (Tribal) 2026-03-27T13:04:16 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 501 BTWTRFRM Big Thompson Watershed Forum (CO) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 877 CA_BVR Big Valley Band of Pomo Indians of the Big Valley Rancheria, California (Tribal) 2026-07-06T18:46:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5830 BIGELOW_WQX Bigelow Laboratory for Ocean Sciences 2026-03-02T09:38:19 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3570 BILLIONOYSTERPROJECT Billion Oyster Project (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 214 21FLBRA_WQX Biological Research Associates (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 346 BISHOPPAIUTETRIBE Bishop Paiute Tribe (Tribal) 2023-08-09T17:26:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 353 BISHOP_PAIUTE_TRIBE_WQX Bishop Paiute Tribe (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 619 BLCKFEET Blackfeet Nation (Montana) 2026-08-20T09:07:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4310 BRC Blackstone River Coalition (Volunteer) 2024-08-13T10:54:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 609 BLR Blue Lake Rancheria (California) (Tribal) 2025-10-21T14:18:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3850 BRWC_WV Blue Ridge Watershed Coalition (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 395 BLUERIVERWATERSHEDASSOCIATION Blue River Watershed Association 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5711 BRWG Blue River Watershed Group (Volunteer) 2026-01-29T11:05:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 801 BOISNETT_WQX Bois Forte/Nett Lake Band of Chippewa Indians (Tribal) 2024-10-16T07:35:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1185 BPMWQX Bonita Peak Mining 2023-03-16T16:46:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5750 BPMDCAG_WQX Bonita Peak Mining District (BPMD Superfund Site) Community Action Group (CAG) 2026-02-13T08:22:30 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 365 BOOMSNUBSITE_EA Boomsnub/Airco Superfund Site EPA Region 10 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 380 BESD Boxelder Sanitation District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 200 21FLBREV_WQX Brevard County Stormwater Utility Department (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 313 BTMUA Brick Utilities 2026-08-25T08:40:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 916 BRIDGEPORTIC Bridgeport Indian Colony (Tribal) 2023-08-09T17:26:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 425 BCUTAHLAB Brigham City Laboratory 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 26 BROADRIVERNC Broad River NC (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5490 BROADWATERCD_WQX Broadwater Conservation District (Volunteer) 2025-08-05T17:07:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 137 BXA Bronx River Alliance (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 549 1083919_WQX Bronx River Alliance (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 786 21FLBROW_WQX Broward County Environmental Protection Department 2026-01-13T08:05:09 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5390 BUCKSCCD Bucks County Conservation District (Pennsylvania) 2025-06-03T10:36:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 833 BVR Buena Vista Rancheria of Me-Wuk Indians of California (Tribal) 2025-10-01T13:40:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5871 BNWRIVERWATCH Buffalo Niagara Waterkeeper 2026-07-29T11:25:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 410 BUNKER_FWS Bunker Hill MIning and Metallurgical Complex (EPA Region 10) FWS 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 675 BUNKER_WQX Bunker Hill Mining and Metallurgical Complex 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 55 BUNKER_USGS Bunker Hill Mining and Metallurgical Complex (Region 10) USGS 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 531 AKBLM_FDO Bureau of Land Management, Fairbanks District (Alaska) 2024-12-31T14:33:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5130 TAOS_FISHERIES_BLM Bureau of Land Management, Taos Field Office (New Mexico) 2025-02-07T13:56:08 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1066 TMBLM_WQX Bureau of Land Management, Tillamook Field Office (OR/WA) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 876 1119USBR_WQX Bureau of Reclamation 2025-11-18T15:51:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 178 USBR-WCAO Bureau of Reclamation Western Colorado Area Office 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 588 BURNSPAIUTE Burns Paiute Tribe (Tribal) 2026-04-23T17:49:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 784 BURNSPAIUTE123 Burns Paiute Tribe (Tribal) 2023-08-09T17:26:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4271 BBC Buzzards Bay Coalition (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4270 BUZZARDSBAYNEP Buzzards Bay National Estuary Program (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 880 CALSWAMP_WQX CA Surface Water Monitoring Program (California) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 495 CA_SWRCB CA Waterboards 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 105 CBS CBS Operations Inc. 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 839 CDATRUST CDA TRUST 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 635 CENTREAL_WQX CENTREAL (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4434 21FLCHCO_WQX CHARLOTTE COUNTY 2025-10-10T13:51:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 696 21FLCBA_WQX CHOCTAWHATCHEE BASIN ALLIANCE 2025-10-08T10:15:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1052 21FLALTA_WQX CITY OF ALTAMONTE SPRINGS 2023-11-16T09:43:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 20 21FLCOBS_WQX CITY OF BONITA SPRINGS 2025-10-13T14:16:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4430 21FLCASS_WQX CITY OF CASSELBERRY 2025-10-08T09:51:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1053 21FLDUNE_WQX CITY OF DUNEDIN 2025-10-16T11:21:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 797 21FLCOFM_WQX CITY OF FORT MYERS 2025-10-13T14:52:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 22 21FLKISS_WQX CITY OF KISSIMMEE 2025-10-23T14:28:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5071 21FLMAIT_WQX CITY OF MAITLAND 2025-10-27T08:22:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 171 21FLCOMI_WQX CITY OF MARCO ISLAND 2025-10-14T12:49:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5630 21FLCON_WQX CITY OF NICEVILLE 2025-11-18T14:12:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4431 21FLNOPO_WQX CITY OF NORTH PORT 2025-11-17T12:02:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 266 21FLCPSL_WQX CITY OF PORT SAINT LUCIE 2025-10-15T14:33:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 753 21AQ_WQX CNMI DIVISION OF ENVIRONMENTAL QUALITY 2024-09-29T23:52:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1271 21FLCRCP_WQX CORAL REEF CONSERVATION PROGRAM 2025-10-15T15:19:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 273 CSC_WQX CSC (Computer Sciences Corporation)(Virginia) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6091 CSU_CFCC CSU Center for Collaborative Conservation 2026-08-11T16:59:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 172 CTVOLMON CT DEEP Volunteer Water Monitoring Program (Volunteer) 2026-08-11T14:13:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 324 CBMI_WQX Cabazon Band of Cahuilla Indians, California (Tribal) 2025-04-11T16:13:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 350 CABAZWQ32 Cabazon Band of Mission Indians, California (Tribal) 2023-08-09T17:26:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 184 CADDONATION_WQX Caddo Nation of Oklahoma (Tribal) 2023-08-09T17:26:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4170 CNEPWATERPROGRAM Caddo Nation of Oklahoma - Caddo Nation Environmental Protection Program (CNEP) (Tribal) 2024-01-08T10:36:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 770 CWLT_WQX Cahto Tribe of the Laytonville Rancheria (Tribal) 2024-11-15T12:13:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 560 CTEPO_WQX Cahuilla Band of Indians - Cahuilla Tribal Environmental Office (Tribal) 2023-08-09T17:26:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 970 CLPWC Calapooia Watershed Council (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 408 CALWR_WQX California Department Of Water Resources 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 879 CADPR_WQX California Department of Pesticide Regulation Surface Water 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 727 CALTRANS_WQX California Department of Transportation 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1095 CADWR_WQX California Department of Water Resources (Volunteer)* 2025-08-18T15:52:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 697 0801478_WQX California Gulch (US EPA Region 8) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 580 CABEACH_WQX California State Water Resource Control Board 2026-03-23T13:11:54 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 828 SWRCB California State Water Resources Control Board 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 764 CEDEN California State Water Resources Control Board 2023-04-20T15:42:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1309 CA_Waterboards California Waterboards (NATIONAL) CA Waterboards 2021-03-11T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 314 CCSCD Camden County Soil Conservation District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 236 CEPACBMI_WQX Campo Environmental Protection Agency (Volunteer)* 2026-04-03T17:18:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4290 CCC Cape Cod Commission (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1275 CCCE-WHSE Cape Cod Cooperative Extension/Woods Hole Sea Grant (Volunteer) 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3750 CAPECOD_REG_WQ Cape Cod Regional Water Quality Monitoring 2023-06-15T15:20:17 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1141 CMCPD Cape May County Planning Department 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 192 0801600_WQX Captain Jack Mine (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 381 CSH Carestream Health Inc. (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1179 CARGILLMS_WQX Cargill Meat Solutions (aka. Fort Morgan Beef Plant) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6111 CARIBREEF Caribbean Reef Fish Foundation 2026-08-16T12:05:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 551 CATAWBA Catawba Indian Nation (Tribal) 2024-10-15T18:16:18 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 742 CATAWBARIVERKEEPER Catawba Riverkeeper Foundation (CRF) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6151 CCDPED Cayuga County Department of Planning and Economic Development 2026-08-24T08:46:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6010 CCPD_WQX Cayuga County Planning Dept 2026-06-15T11:25:02 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1056 CEDARRANCH_WQX Cedarville Rancheria (Tribal) 2025-01-28T17:20:38 AMERICA/NEW_YORK Sample Collection Method 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Sample Collection Method Context(MethodIdentifierContext) 1284 CRWA Laboratory Charles River Watershed Association Laboratory (NATIONAL) 2021-03-27T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 682 21FLCHDH Charlotte County Department of Health 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 93 21FLCHDH_WQX Charlotte County Department of Health 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 837 21FLCCSW_WQX Charlotte County Stormwater Division 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 472 CHARLOTTEHARBOREC_WQX Charlotte Harbor Environmental Center 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1178 CHNEPCHE_WQX Charlotte Harbor National Estuaries Program (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method 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Context(MethodIdentifierContext) 1090 CHNEPPIS_WQX Charlotte Harbor National Estuaries Program (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 303 CHNEPCHP_WQX Charlotte Harbor National Estuaries Program (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 259 CHNEPTPR_WQX Charlotte Harbor National Estuaries Program (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 239 CHNEPTCR_WQX Charlotte Harbor National Estuaries Program (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 237 CHNEPCHW_WQX Charlotte Harbor National Estuaries Program (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 861 CHATFLD_WQX Chatfield Reservoir (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 941 CHATTAHOOCHEERIVERKEEPER Chattahoochee Riverkeeper (CRK) (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3650 WENATCHEEPCBINV_WQX Chelan County Natural Resources Department 2023-09-28T18:59:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 274 CHEMEHUEVI_WQX Chemehuevi Indian Tribe (Tribal) 2026-08-20T12:17:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 585 TRINIDADRANCHERIAEPA Cher-Ae Heights Indian Community of the Trinidad Rancheria (Tribal) 2026-08-21T11:44:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 385 CHEROKEEMD Cherokee Metropolitan District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 814 CHEROKEE_WQX Cherokee Nation (Tribal) 2026-03-11T12:20:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3450 CHESAPEAKBAYNERR Chesapeake Bay National Estuarine Research Reserve (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1135 CBP_WQX Chesapeake Bay Program (CBP) 2025-12-18T11:22:54 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3470 CHESAPEAKEMONITORINGCOOP Chesapeake Monitoring Cooperative (Volunteer) 2026-06-30T16:15:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 891 0834QB00_WQX Cheyenne River 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 979 CHEYRIVR Cheyenne River Sioux Tribe (South Dakota) (Tribal) 2023-08-09T17:26:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 122 CHEYENNEWSD1 Cheyenne Wells Sanitation District No. 1 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 28 CNA Cheyenne and Arapaho Tribes of Oklahoma 2026-08-12T15:34:38 AMERICA/NEW_YORK Sample 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Context(MethodIdentifierContext) 832 COKORG_WQX City Of Kissimmee (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 77 HI301H_WQX City and county of Honolulu 2026-03-31T13:24:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 246 21FLCOAB_WQX City of Atlantic Beach 2025-10-13T12:35:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 702 AURORA_WQX City of Aurora (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 954 EBR_WQX City of Baton Rouge and Parish of East Baton Rouge 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 540 BRIGHTON_WQX City of Brighton (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 555 CAPECRD_WQX City of Cape Coral 2025-11-05T12:41:44 AMERICA/NEW_YORK Sample Collection Method 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Arizona 2022-06-15T11:30:25 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 418 21FLCOSP_WQX City of St Petersburg 2025-10-15T14:05:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 213 21FLCOT_WQX City of Tallahassee Stormwater 2025-10-15T14:21:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 536 21FLBSG_WQX City of Tampa Bay Study Group (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 539 THORNTON_WQX City of Thornton (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 173 TUMWATER City of Tumwater 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1107 21FLWPBH_WQX City of West Palm Beach (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 565 CRBC_WQX Clackamas River Basin Council 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2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1021 CSR_EPA_CWA-106 Cold Springs Rancheria of Mono Indians of California (Tribal) 2023-08-09T17:26:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1020 21FLCCZM_WQX Collier County Coastal Zone Management Department (FL) 2025-10-08T12:05:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 542 21FLCOLL_WQX Collier County Pollution Control (Florida) 2025-11-05T14:54:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 248 COLO319 Colorado 319 organizations 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1304 CDPHE Colorado Department of Public Health and Environment (NATIONAL) CDPHE 2021-03-11T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 110 CDOT Colorado Department of Transportation 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample 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2026-04-27T15:44:27 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 327 ENVIROB1_WQX Confederated Tribes of the Colville Reservation (Tribal) 2023-08-09T17:26:32 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1229 947757 Confederated Tribes of the Coos, Lower Umpqua and Siuslaw Indians (Tribal) 2023-08-09T17:26:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 606 CTCLUSI_WQX Confederated Tribes of the Coos, Lower Umpqua and Siuslaw Indians of Oregon (Tribal) 2026-03-27T13:04:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 773 CTGR Confederated Tribes of the Grand Ronde Community of Oregon (Tribal) 2025-10-09T13:33:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1189 CTUIR_WQX Confederated Tribes of the Umatilla Indian Reservation (Tribal) 2026-02-02T15:08:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 911 934010 Confederated Tribes of the Umatilla Indian Reservation (Tribal) 2023-08-09T17:26:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 882 WARMSPRINGS09 Confederated Tribes of the Warm Springs Reservation of Oregon (Tribal) 2023-08-09T17:26:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2810 CONFLUENCE Confluence Compliance Companies, LLC 2022-03-28T11:04:07 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 72 CT_DEP01_WQX Connecticut Department Of Energy And Environmental Protection 2026-08-05T14:51:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 754 1CTDPHBM Connecticut Department of Public Health 2025-12-26T10:23:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4930 CT_NERR Connecticut National Estuarine Research Reserve (Volunteer) 2026-03-09T15:39:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1228 CONNRIVERCONSERVANCY Connecticut River Conservancy (Volunteer) 2025-12-09T12:11:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 357 COOSWA Coos Watershed Association 2026-06-09T22:44:13 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 768 COQUILLETRIBE_WQX Coquille Indian Tribe (Tribal) 2026-02-19T18:28:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 572 COQUILLE_WA Coquille Watershed Association 2026-05-06T19:39:53 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6171 CCE-SUFFOLK-MARINE Cornell Cooperative Extension of Suffolk County-Marine Program (Volunteer) 2026-08-19T11:57:56 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5310 CORNELLSCALE Cornell University Adirondack Fisheries Research Program 2026-01-16T19:49:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 76 11COETUL_WQX Corps of Engineers, Tulsa District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 933 CORTINARANCHERIA_WQX Cortina Rancheria (Kletsel Dehe Wintun Nation) 2026-07-31T12:24:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 577 CCUI_WQX Cow Creek Band of Umpqua Tribe of Indians (Tribal) 2025-12-03T19:02:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 578 COYOTEVAL_WQX Coyote Valley Band of Pomo Indians of California (Tribal) 2026-07-22T14:18:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 289 CCSHBWA Crafts Creek Spring Hill Brook Watershed Association (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 339 CTA_WQX Craig Tribal Association (Tribal) 2023-08-09T17:26:53 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1146 CRWC_WQX Crooked River Watershed Council (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1166 CROWCRKS Crow Creek Sioux Tribe (SD) 2026-08-25T05:57:22 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1263 CROWNATN Crow Tribe of Indians (Montana) 2026-07-10T03:34:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1117 CC Crowder College, Neosho, Mo. 2026-05-12T08:51:32 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1180 CURRY_WP Curry Watershed Partnerships 2026-08-26T05:03:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 791 DEMOTEST_WQX DEMOTEST_WQX 2026-06-29T09:50:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 255 21FLDADE_WQX Dade Environmental Resource Management (Florida) 2025-10-16T09:56:32 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 563 DRBA Dan River Basin Association (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK 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Collection Method Context(MethodIdentifierContext) 223 DELAWARENATION Delaware Nation, Oklahoma (Tribal) 2025-09-25T17:12:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 765 31DELRBC_WQX Delaware River Basin Commission 2026-02-11T09:39:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 573 11DELMOD_WQX Delaware River Basin Commission 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 176 DRBC Delaware River Basin Commission 2026-07-07T15:57:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 79 31DRBCSP_WQX Delaware River Basin Commission 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 859 EFDELRBC_WQX Delaware River Basin Commisssion 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 288 DRN Delaware Riverkeeper Network (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK 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***RENAMED***ESTOO Eastern Shawnee Tribe of Oklahoma (Tribal) 2026-08-25T18:56:32 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 461 ECOLOG&RESEARCH Ecological Logistics & Research Ltd. 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 227 SIUSLAW_WQX Ecotrust (Tribal) 2023-08-09T17:26:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4810 ERWSCC_WQX Eightmile River Wild and Scenic Watershed in Connecticut (Volunteer) 2025-11-01T18:55:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 874 POMO989_WQX Elem Indian Colony (Tribal) 2024-10-16T07:39:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 352 ELEPHANTFISH ElephantFish, LLC (Volunteer) 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 249 ELKVALLEYCA_WQX Elk Valley Rancheria, California (Tribal) 2025-10-22T15:45:42 AMERICA/NEW_YORK 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Environmental Protection, Southwest District 2025-11-13T11:24:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 530 21FLACST_WQX FL Dept. of Environmental Protection 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1012 21FLGW_WQX FL Dept. of Environmental Protection 2025-11-12T14:55:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 112 21FLA_WQX FL Dept. of Environmental Protection, Northeast District 2025-11-07T11:03:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 83 21FLPNS_WQX FL Dept. of Environmental Protection, Northwest District 2025-11-13T08:20:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1126 21FLCMP_WQX FL Dept. of Environmental Protection, OCEC 2025-10-10T14:41:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 929 21FLFTM_WQX FL Dept. of Environmental Protection, South District 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Association (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4831 GARNA Greater Arkansas River Nature Association (GARNA) (Volunteer) 2025-10-13T10:21:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4550 FLYGRB Green Bay Austin Straubel International Airport 2024-06-05T13:49:33 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2430 GIALANDANDWATER Green Iowa AmeriCorps 2021-06-25T13:35:55 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 599 FTBLKNAP Gros Ventre and Assiniboine Tribe (Fort Belknap Indian Res) 2026-08-21T01:25:56 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 183 GWCO Groundwater Colorado 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3410 GROUNDWORKDENVER Groundwork Denver 2023-09-28T18:59:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3190 NEKCKGREENTEAMGROUNDWORKNRG Groundwork NRG (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5150 GCRI_WQX Guam Coral Reef Initiative 2025-02-17T23:58:24 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1256 21GUBCH Guam Environmental Protection Agency 2026-08-14T00:46:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 726 GUAM Guam Environmental Protection Agency 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 851 21GUAM Guam Environmental Protection Agency (BEACH) 2025-12-23T00:11:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1085 21FLGPC_WQX Gulf Power Company (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 106 STF Gunnison Basin & Grand Valley Selenium Task Force (STF) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1029 HDRINC_WQX HDR Incorporated 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4421 21FLHESD_WQX HILLSBOROUGH COUNTY ENVIRONMENTAL SERVICES DIVISION 2025-10-22T16:52:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 740 21FLFSI_WQX HOWARD T ODUM FLORIDA SPRINGS INSTITUTE 2025-10-20T09:17:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 37 HPUL1EPA_WQX Habematolel Pomo of Upper Lake, California (Tribal) 2025-08-26T14:09:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1050 HALEYALDRICH Haley & Aldrich Inc (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 265 HANALEI_WQX Hanalei Watershed Study (Region 9) - Kauai, Hawaii 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 592 HANNAHWQ_WQX Hannahville Indian Community, Michigan (Tribal) 2026-01-05T15:25:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 197 21FLHBOI_WQX Harbor Branch Oceanographic Institution (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 257 HARBORWATCH_WQX Harbor Watch, a Program of Earthplace, Inc. 2026-01-14T11:58:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 718 HEPD_WQX Havasupai Environmental Protection Department 2026-01-09T21:37:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 15 HAWRIVER03030002 Haw River Assembly 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 546 HIHAWEHWWTP Hawaii American Water Company 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 908 21HI Hawaii Department of Health Clean Water Branch 2026-07-30T19:32:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 78 HIEPO_WQX Hawaii Environmental Planning Office 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 974 HAYWOOD_WQX Haywood Waterways Association, Inc. (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5350 HEDINENV_WQX Hedin Environmental (Volunteer) 2025-06-16T12:35:59 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3050 HEMPSTEAD_BAY_WQMP Hempstead Bay Water Quality Monitoring Program (Volunteer) 2026-04-20T09:05:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3030 HERRERA_ENVIRONMENTAL Herrera Environmental Consultants, Inc. 2024-08-30T13:35:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 449 R0910 Hiawatha National Forest 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1086 HSGMN_WQX High Springs Gap Groundwater Level Monitoring Network (Volunteer)* 2025-08-18T15:52:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 307 HO_CHUNK_WQX Ho-Chunk Nation of Wisconsin 2026-08-20T08:55:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2510 HOFSTRAUML Hofstra University Monitoring Lab 2021-08-31T14:52:30 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 975 HOHTRIBE_WQX Hoh Indian Tribe 2026-08-24T14:48:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6211 HCCC Hood Canal Coordinating Council (Volunteer) 2026-08-21T14:10:16 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2290 HIA_WQX Hoonah Indian Association (Tribal) 2023-08-09T17:26:53 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 988 HVTEPA_WQX Hoopa Valley Tribe 2026-08-25T23:40:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 363 HOOPERDOB_WQX Hooper Lab, Dept. of Biology, Western Washington 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 973 HOOSIER Hoosier Riverwatch (Volunteer)* 2026-07-01T08:26:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 875 HOPI_WQX Hopi Tribe of Arizona (Tribal) 2023-08-09T17:26:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 621 HOPTERA_WQX Hopland Band of Pomo Indians, California (Tribal) 2025-01-06T18:15:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5470 HORSLEYWITTEN_WQX Horsley Witten Group 2026-08-17T13:11:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 887 HBMI_WQX Houlton Band of Maliseet Indians (Tribal) 2024-10-16T07:40:05 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1279 HVA Housatonic Valley Association - 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New Jersey - Connecticut 2026-08-24T10:35:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 528 IAAFO_WQX Iowa DNR Animal Feeding Operation 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 869 21IOWA_WQX Iowa DNR Surface Water Monitoring Data 2025-06-03T13:21:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1006 IAPEST Iowa DNR/Iowa Geological and Water Survey 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1175 IASNAPST_WQX Iowa Geological Survey (Iowa) Watershed Snapshots 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 11 IOWAGW_WQX Iowa Groundwater Data 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1163 IOWAST_WQX Iowa State University of Science and Technology 2021-06-02T09:54:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 843 IOWATROK_WQX Iowa Tribe of Oklahoma (Tribal) 2024-10-15T15:05:13 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 309 IOWATER_WQX Iowa Volunteer Water Monitoring Program 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 433 IRWA Ipswich River Watershed Association (Volunteer) 2026-06-30T15:02:01 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 881 IRONMT_WQX Iron Mountain Mine Superfund Site 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5570 ISLANDCOUNTYWA_WQX Island County Washington Public Health - 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Simplot and FMC Corporation 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 494 21FLJEA_WQX Jacksonville Electric Authority 2025-10-23T10:40:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2950 JMU_ISAT_WQX James Madison University Integrated Science and Technology Department 2023-04-06T16:48:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 676 CLALLAMCODCD Jamestown S'Klallam Tribe (Tribal) 2026-03-27T12:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 329 JSKTRIBE_WQX Jamestown S'Klallam Tribe (Tribal) 2023-08-09T17:26:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 463 JAMUL_WQX Jamul Indian Village (Tribal) 2024-10-15T18:12:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 464 JCPH_WQX Jefferson County Public Health 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method 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KWO Kansas Water Office 2025-01-28T07:59:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 590 KARUKDNR_WQX Karuk Tribe (Tribal) 2026-01-06T15:48:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 301 KASHIA Kashia Band of Pomo Indians of the Stewarts Point Rancheria, California (Tribal) 2025-12-18T17:27:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 209 KATSPROJ_WQX Katrina Response Special Projects 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 308 KAWNATON_WQX Kaw Nation, Oklahoma (Tribal) 2023-08-09T17:26:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 143 KENAI_NWR Kenai National Wildlife Refuge 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1104 KENAI_WQX Kenai Watershed Forum (Volunteer) 2026-04-02T16:32:39 AMERICA/NEW_YORK Sample Collection Method 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KINGCOUNTY King County (Washington) 2025-12-30T04:07:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3330 KINGCOENVIROLAB King County Environmental Laboratory 2023-09-28T18:59:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 394 KIOWA_WQX Kiowa Indian Tribe of Oklahoma (Tribal) 2026-08-07T12:35:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 88 KITSAPCHD_WQX Kitsap County Health District 2022-10-27T18:59:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 568 KLAMATHTRIBES_WQX Klamath Tribes (Tribal) 2023-08-09T17:26:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3770 KOOTENAI_TRIBE_OF_IDAHO_WQX Kootenai Tribe of Idaho (Tribal) 2026-06-22T18:24:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 95 LCO106_WQX LAC COURTE OREILLES 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method 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Collection Method Context(MethodIdentifierContext) 456 LAJOLLA La Jolla Band of Luiseno Indians, California (Tribal) 2023-08-09T17:26:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 496 LPEPA106 La Posta EPA (Tribal) 2024-10-15T18:15:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 643 LCOWIS_WQX Lac Courte Oreilles (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 630 LDFWATER2007 Lac Du Flambeau Band of Lake Superior Chippewa Indians Water Program (Tribal) 2026-07-16T16:12:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 804 STORLVD_WQX Lac Vieux Desert Band of Lake Superior Chippewa 2026-05-02T07:16:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 728 WATERLDF_WQX Lac du Flambeau Band of Lake Superior Chippewa Indians of the Lac du Flambeau Reservation of Wisconsin (Tribal) 2023-08-09T17:26:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 186 LCBP Lake Champlain Basin Program 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 689 21FLLCPC_WQX Lake County Water Resource Management 2025-10-24T12:46:17 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5450 LEVSN_WQX Lake Erie Volunteer Science Network (Volunteer) 2025-08-12T18:29:55 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 428 LFVC Lake Fork Valley Conservancy 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 504 LFWS Lake Fork Watershed Stakeholders (Colorado) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 788 LHC Lake Hopatcong Commission (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 45 LQWA Lake Quinsigamond Watershed Association (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1007 LANECOUNCILOFGOVERNMENTS Lane Council of Governments 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 147 LAWRENCEBROOKWW_WQX Lawrence Brook Watershed Watch (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1128 21FLEECO_WQX Lee County 2025-10-16T12:23:58 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 240 21FLLCHD_WQX Lee County Hyacinth Control District (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 593 LEECHLAK_WQX Leech Lake Band of Ojibwe (Tribal) 2026-08-20T12:04:28 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 556 21FLLEON_WQX Leon County Public Works (Florida) 2025-10-24T14:03:57 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 383 LFGC Leprino Foods Greeley Cheese and Whey Facility 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1160 LEVELOCK Levelock Village (Tribal) 2023-08-09T17:26:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 13 LCWCD_WQX Lincoln Soil and Water Conservation District (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 586 LRBOI_WQX Little River Band of Ottawa Indians (Tribal) 2026-08-20T11:32:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 505 LSFOBLM Little Snake Field Office, BLM (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1190 LTBBWATR_WQX Little Traverse Bay Bands of Odawa Indians (Tribal) 2026-08-20T12:30:29 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 701 LEWWTP_WQX Littleton/Englewood Wastewater Treatment Plant (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 737 LOCUS_WQX Locus Technologies 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 931 LPPSR_WQX Lone Pine Paiute-Shoshone Reservation (Tribal) 2023-08-09T17:26:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 806 LISICOS Long Island Sound Integrated Coastal Observing System (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1032 LONGTOM_WC Long Tom Watershed Council 2026-01-17T00:03:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 80 22LAGWTR_WQX Louisiana Department Of Environmental Quality 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 230 21LABCH Louisiana Department of Health 2025-11-18T17:29:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3390 LOWERARKVALLEYWATERCONSDIST Lower Arkansas Valley Water Conservation District 2026-08-14T16:58:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 622 LWRBRULE Lower Brule Sioux Tribe (South Dakota) 2026-04-30T16:50:22 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 603 ELWHAWQ1_WQX Lower Elwha Klallam Tribe (Washington) (Tribal) 2026-08-20T12:35:26 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 328 ELWHA1_WQX Lower Elwha Tribal Community (Tribal) 2023-08-09T17:26:34 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 389 LFMSDD Lower Fountain Metropolitan Sewage Disposal District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 131 LOWERRARITANWATERSHED Lower Raritan Watershed Partnership (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 807 LSIOUX_WQX Lower Sioux Indian Community (Tribal) 2026-03-27T13:04:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 639 21FLLOX_WQX Loxahatchee River District 2025-10-24T15:07:01 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 47 21FLLOXB_WQX Loxahatchee River District (Florida) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 488 LUMMINSN_WQX Lummi Tribe of the Lummi Reservation (Tribal) 2026-03-06T12:24:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4427 21FLMAR_WQX MARTIN COUNTY BOARD OF COUNTY COMMISSIONERS 2025-10-27T09:02:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 263 MBMG_WQX MBMG_WQX - Montana Bureau of Mines and Geology 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1083 MDEDAT10_WQX MD Dept. of the Environment Private Pier Aquaculture Program 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 900 MDEDAT06_WQX MDE Private Groups/Local Subdivision Data 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 125 MDE_STORMWATER MDE, WMA, Stormwater 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 955 MDEQ_MPDES_WQX MDEQ_MPDES_WQX - MT Pollutant Discharge Elimination System 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 792 MRRI-NJSEA MEADOWLANDS RESEARCH & RESTORATION INSTITUTE (MRRI) 2025-10-27T15:37:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 802 MENOM_WQX MENOMINEE INDIAN TRIBE OF WISCONSIN (Wisconson) 2026-04-29T08:00:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4426 21FLMWK_WQX MIAMI WATERKEEPER 2025-10-27T09:48:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1043 21MSWQ_WQX MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY 2026-04-01T13:05:53 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4420 21FLMONR_WQX MONROE COUNTY BOARD OF COUNTY COMMISSIONERS 2024-03-22T11:42:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 533 MONT_DEQ_WQX MONT_DEQ_WQX - Montana DEQ - Pre-1999 Data 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 23 21FLMOSA_WQX MOSAIC FERTILIZER, LLC. 2025-10-27T09:33:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 469 MUSCONETCONGORG_WQX MUSCONETCONG WATERSHED ASSOCIATION (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 760 21MEBCH Maine Department of Environmental Protection 2026-01-21T12:08:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 235 MEDEP_WQX Maine Department of Environmental Protection 2025-12-10T15:21:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 318 MAKAH_WQX Makah Indian Tribe of the Makah Indian Reservation (Tribal) 2026-06-23T18:44:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 550 MSWCD_WQX Malheur Soil and Water Conservation District (SWCD)(Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1033 MALHEUR_WC Malheur Watershed Council (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 892 21FLMANA_WQX Manatee County Parks and Natural Resources Department (Florida) 2025-10-27T08:47:01 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 372 MANZANITA Manzanita Band of Diegueno Mission Indians of the Manzanita Reservation, California (Tribal) 2023-08-09T17:26:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 174 MPSLML Marine Pollution Studies Lab at Moss Landing Marine Laboratories, 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 199 MRSENVMB_WQX Marine Research 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1108 21FLMRC_WQX Marine Resource Council of East Florida 2025-10-27T10:06:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1237 MARITIME-PLANNING-WQX Maritime Planning Associates (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 905 MARSHALL_WQX Marshall University 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6031 MARSHALL_UNIV_NRES Marshall University Department of Natural Resources and the Environment 2026-07-21T10:38:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 124 MDE_FSP Maryland Department of Environment Food Supplement Program 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 943 MDEDAT05_WQX Maryland Department of Natural Resources 2025-12-23T17:46:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 254 MDDNR Maryland Department of Natural Resources 2021-04-10T05:08:13 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 755 MDEDAT08_WQX Maryland Department of the Environment Beaches Data 2025-12-15T12:32:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 898 MDEDAT01_WQX Maryland Dept. of the Environment Dredging Ambient Data 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1081 MDEDAT07_WQX Maryland Dept. of the Environment Shellfish Data 2025-08-06T11:15:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 841 MDE_FIELDSERVICES_WQX Maryland Dept. of the Environment In House Water Data 2026-07-31T14:37:54 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1082 MDEDAT09_WQX Maryland Dept. of the Environment Risk Assessment Data 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 899 MDEDAT03_WQX Maryland Dept. of the Environment Toxics Data 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4330 MWT Mashpee Wampanoag Tribe (Tribal) 2024-10-15T15:05:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 38 MCPH_WQX Mason County Public Health 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3333 MASSWATER MassWateR - Massachusetts surface water quality, a Mass Bays National Estuary Partnership. (NATIONAL) 2022-12-13T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3350 MASSWATER_WQX Massachusetts Bays National Estuary Partnership (MASSBAYS) 2023-01-06T12:54:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2830 MASSBAYS Massachusetts Bays National Estuary Partnership (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 462 MASSBAYS01 Massachusetts Bays National Estuary Program 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 743 MA_DEP Massachusetts Department Of Environmental Protection (MA) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 915 MASSDEP Massachusetts Department of Environmental Protection (MassDEP) 2023-07-14T17:15:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5710 MA_DEP_TEST Massachusetts Department of Environmental Protection Test 2026-06-02T16:37:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 759 21MABCH Massachusetts Dept. of Public Health 2026-03-02T10:48:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1184 MWRA_WQX Massachusetts Water Resources Authority 2023-08-16T12:59:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1151 MAWRRC_WQX Massachusetts Water Resources Research Center 2026-07-27T14:57:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 674 MAWRWMP Massachusetts Westfield River Water Monitoring Program (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 276 GNLK01_WQX Match-e-be-nash-she-wish Band of Pottawatomi Indians of Michigan (Gun Lake) 2026-04-29T11:37:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 872 MATTOLERESTORATIONCOUNCIL Mattole Restoration Council (California) (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 312 MATTOLE_SALMON Mattole Salmon Group (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 373 MAULFOSTER_WQX Maul Foster and Alongi, Inc. 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 251 21FLMCGL_WQX McGlynn Laboratories, Inc 2024-10-24T10:01:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 179 MITCR_WQX Mechoopda Indian Tribe of Chico Rancheria, California (Tribal) 2023-08-09T17:26:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 149 FRESHWATER_INSTITUTE Megan Murray (Volunteer) 2025-06-16T12:35:59 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 883 MERRIMACK_RIVER_WATERSHED_WQX Merrimack River Watershed Council (Volunteer)* 2026-02-18T09:16:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 714 DRMPWQX Mescalero Apache Tribe DRMP (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 344 MESKWAKI_DNR Meskwaki Department of Natural Resources (Tribal) 2025-12-18T10:55:01 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5590 METLAKATLA_WQX Metlakatla Indian Community (Tribal) 2025-11-19T15:51:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 534 MWRD_WQX Metro Water Recovery (formerly Metro Wastewater Reclamation District) 2026-06-02T11:20:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 481 METC_WQX Metropolitan Council (Minnesota) 2023-02-13T22:41:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 693 MWRDSTOR_WQX Metropolitan Water Reclamation District of Greater Chicago 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 818 MCD1913FLOOD Miami Conservancy District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 222 MIAMITRIBEOFOKLAHOMA Miami Water Quality Monitoring Program (Tribal) 2026-08-20T12:36:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 509 21MICH_WQX Michigan DEQ 2026-05-19T10:01:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5671 21MICH_MICORPS Michigan EGLE - MiCorps 2026-01-12T09:53:20 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5670 21MICH_WRD Michigan EGLE - WRD 2026-08-18T08:57:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 427 MIDCOWATERSHED Middle Colorado Watershed Council (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 799 MIDDLEDESCHUTES_WC Middle Deschutes Watershed Council (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 229 MIDDLESPRINGWATERSHED Middle Spring Watershed (Pennsylvania) (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 595 MIDDLETOWNUPCW_WQX Middletown Rancheria of Pomo Indians of California (Tribal) 2025-10-13T13:49:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 409 MIDEWIN Midewin National Tallgrass Prairie 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 963 MRC Midlands Rivers Coalition (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 86 MIDNITE_2 Midnite Mine Environmental Data 2026-07-02T18:22:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1119 MEC Midwest Envir. Consultants 2026-05-12T09:35:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3810 MCA_WQX Mill Creek Alliance (Volunteer) 2023-08-04T15:19:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 903 MCWCC_WQX Mill Creek Watershed Council of Communities (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1260 MLBO_DNR_WQX Mille Lacs Band of Ojibwe DNR/Environment (Tribal) 2026-08-20T12:34:08 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 454 MILLERCOORS MillerCoors 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 562 WI_MMSD Milwaukee Metropolitan Sewerage District 2026-02-17T09:53:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1071 BCENV Ministry of Environment and Climate Change Strategy, Environmental Protection Division 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1169 GPORTAGE_WQX Minnesota Chippewa Tribe, Minnesota (Six component reservations: Bois Forte Band (Nett Lake); Grand Portage Band;)Tribal 2023-08-09T17:26:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 871 WEARTH_WQX Minnesota Chippewa Tribe, Minnesota (White Earth Band) (Tribal) 2026-03-18T15:19:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 417 MNDA_PESTICIDE Minnesota Department of Agriculture - Pesticide Monitoring 2026-06-10T18:08:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 336 MNDNR_AGW Minnesota Dept of Natural Resources - Ambient Groundwater 2026-04-16T10:58:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 99 21MNBCH Minnesota Dept. of Health (BEACH) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 752 MNPCA1_WQX Minnesota Pollution Control Agency (BEACH) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 513 MNPCA_AGW Minnesota Pollution Control Agency - Ambient Groundwater 2026-06-23T08:48:58 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 821 MNPCA Minnesota Pollution Control Agency - Ambient Surface Water 2026-05-21T15:07:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 424 MNPCA_BIO Minnesota Pollution Control Agency - Biological Monitoring 2024-05-13T10:04:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 191 MNPCAB_WQX Minnesota Pollution Control Agency Biological Monitoring 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 767 MBCI_OEP Mississippi Band of Choctaw Indians (Tribal) 2024-10-16T07:34:19 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 836 21MSBCH Mississippi Department of Environmental Quality (BEACH) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1068 MDC Missouri Dept. of Conservation 2026-05-12T08:53:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1118 MDNR Missouri Dept. of Natural Resources 2026-05-12T09:02:16 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1120 MSU Missouri State University 2026-05-12T09:31:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 713 MNISOSE07 Mni Sose Intertribal Water Rights Coalition (Tribal) 2023-08-09T17:26:32 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 97 MOAPA_WQX Moapa Band of Paiute Indians of the Moapa River Indian Reservation, Nevada (Tribal) 2023-08-09T17:26:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4210 MOBILEBAYNEP_WQX Mobile Bay National Estuary Program 2024-01-10T15:56:54 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 990 MCHD Monmouth County Health Department 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2690 MT305b_SecondaryData Montana 303d/305b Call for Secondary Data 2026-04-13T14:09:58 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4150 MDEQ_AMP_WQX Montana DEQ Adaptive Management Program 2024-01-05T12:04:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 972 MDEQ_REM_WQX Montana DEQ Remediation 2026-03-07T16:32:55 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 858 MDEQ_WQ_WQX Montana DEQ WQPB 2026-08-21T16:01:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1281 MDEQ-WQ Montana Department of Environmental Quality - Water Quality (NATIONAL) 2021-03-27T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 34 MTNWE Montana NorthWestern Energy 2024-11-15T17:11:42 AMERICA/NEW_YORK Sample Collection Method 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Carolina Department of Environmental Resources NCDENR-DWQ 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1209 21NC02WQ_WQX North Carolina Department of Environmental Resources NCDENR-DWQ (2nd) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 681 21NC03WQ North Carolina Dept of Environmental Quality NCDEQ-DWR WQX 2026-08-13T13:21:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 935 NCUSGS North Carolina USGS 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1206 NCWA_WQX North Coast Watershed Association (Volunteer)* 2025-09-09T17:22:22 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 997 21NDHDWQ_WQX North Dakota Department Of Environmental Quality 2026-08-14T12:57:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1026 NFRIA North Fork River Improvement Association 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PROJECT COAST - Southwest Florida Water Management District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1069 PR_BEACH_WQX PUERTO RICO ENVIRONMENTAL QUALITY BOARD (BEACH) 2026-02-19T14:02:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1307 PIBO-EMP PacFish/InFish Biological Opinion Effectiveness Monitoring Program (NATIONAL) PIBO-EMP 2021-03-11T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1308 PNAMP Pacific Northwest Aquatic Monitoring Partnership (NATIONAL) PNAMP 2021-03-11T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 87 PADDLEFISH Paddlefish. 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1168 FPST Paiute-Shoshone Tribe of the Fallon Reservation and Colony, Nevada (Tribal) 2026-01-23T13:03:58 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 949 PALABAND Pala Band of Mission Indians (Tribal) 2023-08-09T17:26:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 35 PALERMOWELLFIELD_CH2M Palermo Wellfield Superfund Site by CH2M HILL Inc 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 182 PALERMOWELLFIELD_WQX Palermo Wellfield Superfund Site by Geoengineers Inc. (Volunteer)* 2026-07-28T17:01:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 820 21FLPBCH_WQX Palm Beach County Environmental Resources Management Departm 2025-10-27T12:12:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 282 PDHP7L Park District of Highland Park 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1277 PRCWA Parker River Clean Water Association (Volunteer) 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1197 PUR_WQX Partnership for the Umpqua Rivers, Inc. 2026-04-11T11:48:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 781 21FLPASC_WQX Pasco County Stormwater Management Division 2025-11-17T13:55:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 290 PREEM Passaic River Educational Environmental Monitoring (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 854 PASSAMAQUODDYSIPAYIKENV Passamaquoddy Tribe (Tribal) 2025-06-17T15:58:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 888 PTI_ITS_WQX Passamaquoddy Tribe (Tribal) 2025-11-05T09:22:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 228 PAUMATRIBE Pauma Band of Luiseno Mission Indians of the Pauma & Yuima Reservation, California (Tribal) 2025-10-28T15:47:24 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 330 PNDECS_WQX Pawnee Nation of Oklahoma (Tribal) 2026-02-11T11:40:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 349 PECHANGA_WQX Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, California (Tribal) 2026-06-09T12:30:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 617 PENOBSCOTINDIANNATIONDNR Penobscot Indian Nation (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 305 PEORIAWATER Peoria Tribe (Tribal) 2026-08-20T12:31:33 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 847 WQXPQRC Pequannock River Coalition 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1289 PFBMP Per- and PolyFluoroalkyl Substance (PFAS) Best Management Practice (BMP) (NATIONAL) Department of Natural Resources Parks Freshwater Beach SOP 2021-06-03T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 678 PCSWD Perry Co. Soil and Water District 2026-05-12T09:32:53 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2930 PHINIZYCENTERFORWATERSCIENCES Phinizy Center for Water Sciences 2022-07-18T09:20:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 670 PICAYUNERANCHERIACWA106 Picayune Rancheria of Chukchansi Indians of California (Tribal) 2023-08-09T17:26:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 597 PRCI_WQX Picayune Rancheria of the Chukchansi Indians (Tribal) 2023-08-09T17:26:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 467 PICEANCE_LDR Piceance Basin Legacy Data Repository 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 177 PICURIS_PUEBLO Picuris Pueblo (Tribal) 2024-10-15T15:05:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 6030 PCRFCD_AZ Pima County Regional Flood Control District 2026-06-26T11:38:56 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2870 PIMA_AZ Pima County, Arizona (Regional Wastewater Reclamation Department) 2026-03-09T19:09:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1013 21FLPDEM_WQX Pinellas County Dept. of Environmental Management 2025-10-27T13:06:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 614 PPNPROGRAM Pinoleville Pomo Nation, California (Tribal) 2026-07-28T13:31:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2330 PREP Piscataqua Region Estuaries Partnership (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 937 PRTWQX Pit River Tribe, California: XL Ranch, Big Bend, Likely, Lookout, Montgomery Creek and Roaring Creek Rancherias (Tribal) 2023-08-09T17:26:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 647 WQXWEBTRAINING2 Poarch Band of Creeks (Tribal) 2023-08-25T20:55:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 302 POARCHCRK_WQX Poarch Band of Creeks (Tribal) 2024-08-06T15:47:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 618 PBDNR Pokagon Band of Potawatomi Indians, Michigan and Indiana (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1042 PCCB_WQX Polk County Conservation Board 2026-08-04T08:33:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 640 21FLPOLK_WQX Polk County Natural Resources Division 2025-10-28T09:45:06 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 299 PCWA Pompeston Creek Watershed Association (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4832 PONCA_TRIBE_WQX Ponca Tribe of Nebraska (Tribal) 2024-10-15T17:52:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1031 LPBFSAVEOURLAKE Pontchartrain Conservancy (Volunteer) 2026-08-05T11:46:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 575 PUJ Pontificia Universidad Javeriana 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 243 PGSTNATR_WQX Port Gamble S'Klallam Tribe (Tribal) 2023-08-09T17:26:33 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1274 PORTGRAHAM Port Graham Village Council (Tribal) 2023-08-09T17:26:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 557 PTMSC Port Townsend Marine Science Center (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1116 PSUCLR Portland State University, Center for Lakes and Reservoirs 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 133 PORTLANDHARBORRISS PortlandHarborRISS 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 198 PATCMON_WQX Potomac Appalachian Trail Club Volunteer Monitoring - VA,MD (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4710 POTTERVALLEYTRIBE Potter Valley Tribe (Tribal) 2026-01-30T19:36:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 961 PBWC_WQX Powder Basin Watershed Council (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1105 PRAIRIEBAND Prairie Band Potawatomi Nation (Tribal) 2026-08-17T16:48:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 272 PIIC_WQX Prairie Island Indian Community 2026-07-17T22:45:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3270 PRINCETONHYDRO Princeton Hydro LLC 2026-07-30T21:27:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4890 PACOG_WQX Pueblo Area Council of Governments (PACOG) 2024-12-20T10:24:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 340 PUEBLOOFTESUQUE Pueblo Of Tesuque (Tribal) 2023-08-09T17:26:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 390 PUEBLOWMD Pueblo West Metropolitan District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 348 ACOMA_PUEBLO_WQX Pueblo of Acoma, New Mexico (Tribal) 2023-08-09T17:26:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 912 COCHITIPUEBLO Pueblo of Cochiti, New Mexico (Tribal) 2023-08-09T17:26:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 438 PUEBLOISLETA Pueblo of Isleta, New Mexico (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 343 PUEBLOJEMEZ Pueblo of Jemez (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 605 POLSWATER_WQX Pueblo of Laguna (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 370 PUEBLO_POJOAQUE Pueblo of Pojoaque (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 913 SANDIAWQ_WQX Pueblo of Sandia Water Quality Program (New Mexico) 2026-08-26T06:44:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 878 PUEBLO_SANTAANA Pueblo of Santa Ana, New Mexico (Tribal) 2026-08-20T12:30:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 451 SANTACLARAPBLO Pueblo of Santa Clara 2026-08-11T11:06:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1218 TAOSPBLO_WQX Pueblo of Taos (Tribal) 2026-03-27T13:04:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 12 TPEO_WQX Pueblo of Taos, New Mexico (Tribal) 2023-08-09T17:26:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 66 PREQB_GW_WQX Puerto Rico Environmental Quality Board (GW) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 543 PR_RIVER_WQX Puerto Rico Environmental Quality Board (Rivers) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 225 PR_LAKES_WQX Puerto Rico Environmental Quality Board (Surface Waters) 2024-04-03T10:38:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1226 PR_COAST_WQX Puerto Rico Environmental Quality Board Coastal 2023-09-26T11:44:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 320 PUYALLUP_WQX Puyallup Tribe of the Puyallup Reservation (Tribal) 2025-12-19T19:29:12 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1101 PYRAMIDLAKE Pyramid Lake Paiute Tribe of the Pyramid Lake Reservation, Nevada (Tribal) 2026-07-09T13:40:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 613 QTEO_WQX Quapaw Tribe of Indians, Oklahoma (Tribal) 2026-06-11T11:19:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 27 QVIR Quartz Valley Indian Community of the Quartz Valley Reservation of California (Tribal) 2025-12-23T15:31:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 476 QUECHAN_WQX Quechan Tribe of the Fort Yuma Indian Reservation, California & Arizona (Tribal) 2025-10-28T12:21:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 873 QUILEUTE_WQX Quileute Natural Resources (Washington) (Tribal) 2026-03-27T13:04:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 857 QIN_WQX Quinault Indian Nation (Tribal) 2023-08-09T17:26:34 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1097 R8MONTWQ R8MONTWQ - EPA Region 8 Organization 2021-08-03T20:33:25 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 923 RTI RTI International 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1204 RAMONA Ramona Band of Cahuilla, California (Tribal) 2023-08-09T17:26:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 910 RCESLM Ramsey County Environmental Services, Lake Management 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1142 RHA Raritan Headwaters Association (Volunteer) 2026-07-27T14:58:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3110 REDCLAYSTATEPARK-TN Red Clay State Historic Park 2022-08-27T20:43:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1191 REDCLIFF_WQX Red Cliff Band of Lake Superior Chippewa (WI) (Tribal) 2026-08-20T12:31:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 808 REDLAKE_WQX Red Lake DNR 2026-07-21T10:49:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 517 0801417_WQX Red Mountain Pass Zinc (US EPA Region 8) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 827 REDDINGRANCHERIA_WQX Redding Rancheria, California (Tribal) 2023-08-09T17:26:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 180 RVRPOMO Redwood Valley Rancheria (Tribal) 2024-10-15T15:05:12 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1266 21FLRCID_WQX Reedy Creek Improvement District - Env Services (Florida) 2025-10-28T10:22:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 526 KATRINA6_WQX Region 6 Katrina Emergency Monitoring Data 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 524 STANDARD_WQX Region 8 Superfund: Standard Mine 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 203 NTEMPLE_WQX Region 8 Superfund: West North Temple Plume 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 204 0801698_WQX Region 8 Superfund: 3700-3800 West 2100 South Solvent Plume 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 525 0801695_WQX Region 8 Superfund: Delta 400 West Plume 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 205 0801812_WQX Region 8 Superfund: Murray Laundry 4200 S State Plume 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 707 RPI_SCALE Rensselaer Polytechnic Institute 2025-04-17T12:16:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5411 RPI Rensselaer Polytechnic Institute 2026-07-27T10:30:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 326 RREPA_WQX Resighini Rancheria, California (Tribal) 2026-01-09T15:03:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 886 RCA Resource Consulting and Associates 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 347 DVSJ_RETIRED Retired Death Valley Timbi-sha Shoshone Tribe (Tribal) 2026-07-23T15:57:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 140 REVIVETHESANJOAQUIN_WQX Revive the San Joaquin (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1034 RIDEM Rhode Island 2024-09-28T08:12:55 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 756 21RIBCH Rhode Island Department of Health 2026-03-10T10:04:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 104 RGHRP Rio Grande Headwaters Restoration Project (RGHRP) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 470 RM11E_SUPRIFS River Mile 11 East (RM11E) Supplemental Remedial Investigation/Feasibility Study, Portland Harbor Superfund Site, OR 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1038 RIVERKEEPER Riverkeeper (Volunteer) 2025-10-28T12:36:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4010 RIVERSUNLIMITED Rivers Unlimited (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 477 RFC Roaring Fork Conservancy (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 994 ROBINSONRANCHERIAENVIRONMENTAL Robinson Rancheria (Tribal) 2026-07-22T13:55:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5330 ROCKBRIDGE_WQX Rockbridge Conservation (Volunteer) 2025-06-16T12:35:59 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 44 RRWC_WQX Rogue River Watershed Council (Volunteer) 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 570 RRK_WQX Rogue Riverkeeper (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 798 RVCG Rogue Valley Council of Governments 2026-01-16T00:20:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1150 ROSEBUDSIOUXTRIBE Rosebud Sioux Tribe (Tribal) 2024-10-16T07:44:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 342 ROUNDVALLEY Round Valley Indian Tribes, Round Valley Reservation, California (Tribal) 2023-08-09T17:26:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 608 RCE WRP Rutgers Cooparative Extension Water Resource Program (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 825 RU_MUSC Rutgers Water Resources 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 897 21FLSCCF_WQX SANIBEL CAPTIVA CONSERVATION FOUNDATION 2025-10-29T11:35:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 50 21SCGW_WQX SC Dept. of Health Control 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 52 21SCESOP_WQX SC Dept. of Health Control 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1136 SCI SCI Engineering 2026-05-12T09:37:22 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1267 21FLSMRC_WQX SMR Communities, Inc. (Florida) 2025-10-31T11:46:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4423 21FLSABR_WQX ST. ANDREW BAY RESOURCE MANAGEMENT ASSOCIATION INC. 2025-10-28T13:16:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5091 21FLSJUD_WQX ST. JOHNS COUNTY UTILITY DEPARTMENT 2025-11-06T14:31:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3730 SRA STEWARDS 2023-09-28T18:19:27 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5090 21FLSCWK_WQX SUNCOAST WATER KEEPERS 2025-10-29T12:02:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 226 SACFOXMO Sac & Fox Nation of Missouri in Kansas and Nebraska (Tribal) 2023-08-09T17:26:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 100 SFNOES_WQX Sac and Fox Nation (Tribal) 2024-10-15T18:02:57 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 805 SAGIN01_WQX Saginaw Chippewa Indian Tribe of Michigan (Tribal) 2026-01-30T09:22:24 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 361 SRMTAKNY_WQX Saint Regis Mohawk Tribe (Tribal) 2023-08-09T17:26:32 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 493 SRMTWRP_WQX Saint Regis Mohawk Tribe (Tribal) 2024-10-03T11:41:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 155 SAINTVSD Saint Vrain Sanitation District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1080 SSCW Salem Sound Coastwatch (Volunteer) 2026-02-11T15:44:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 969 VM_SDCWC_AW Salmon Drift Creek Watershed Council (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5650 SWAN Salonga Wetland Advocates Network, Inc. 2025-12-04T12:53:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 450 SALTCHUCK_WQX Salt Chuck Mine, State of Alaska 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1140 SLCOWS Salt Lake County Watershed 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 596 SRPMIC Salt River Pima-Maricopa Indian Community (SRPMIC) (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1219 SRPMIC_WQX Salt River Pima-Maricopa Indian Community of the Salt River Reservation, Arizona (Tribal) 2023-12-22T17:45:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 185 SAMISHINDIAN_WQX Samish Indian Nation (Tribal) 2026-04-02T18:59:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4990 SCAPED San Carlos Apache Environmental Department (Tribal) 2026-08-20T12:05:09 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 672 SANCARLOSAPACHETRIBE San Carlos Apache Tribe of the San Carlos Reservation, Arizona (Tribal) 2023-08-09T17:26:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5910 SCAT San Carlos Apache
Tribe (Tribal) 2026-05-14T07:38:16 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1004 SDCKWMG_WQX San Deigo Coastkeepers Water Monitoring Group (CA) (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 400 SANFELIPE_WQX San Felipe Pueblo (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3930 SFEI San Francisco Estuary Institute 2023-09-28T18:59:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1102 SANILDEFONSODECP San Ildefonso Pueblo, NM (Tribal) 2026-07-07T13:14:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 18 SJBEP San Juan Bay Estuary Program (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2670 SJICD_WA San Juan Islands Conservation District 2021-10-27T07:45:20 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 398 SANMANUEL San Manuel Band of Mission Indians, California (Tribal) 2023-08-09T17:26:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 717 SMENVIRONMENTAL_WQX San Manuel Band of Mission Indians, California (Tribal) 2023-08-09T17:26:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1055 SANMATEORCD San Mateo Resource Conservation District 2022-02-28T14:29:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 446 SMWC San Miguel Watershed Coalition (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 819 SANPASQUAL San Pasqual Band of Diegueno Mission Indians of California (Tribal) 2024-10-03T16:51:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1247 SRBCI Santa Rosa Band of Cahuilla Indians (Tribal) 2023-08-09T17:26:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3711 SRCENV_WQX Santa Rosa County Florida Environmental Department 2025-10-28T14:05:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 359 SANTAROSA Santa Rosa Indian Community of the Santa Rosa Rancheria, California (Tribal) 2023-08-09T17:26:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1000 SYCEO_WQX Santa Ynez Band of Chumash Indians (Tribal) 2026-03-27T13:04:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 856 21SCSANT_WQX Santee Cooper - South Carolina Public Service Authority 2026-02-17T12:41:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 421 SANTEEWATER Santee Sioux Nation of Nebraska (Tribal) 2023-08-09T17:26:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 694 21FLSARA_WQX Sarasota County Environmental Services 2025-10-29T09:58:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 85 SAUKSUIATTLE Sauk-Suiattle Indian Tribe (Tribal) 2023-08-09T17:26:34 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 366 SAULTSTEMARIE Sault Ste. Marie Tribe of Chippewa Indians (Tribal) 2024-10-15T15:05:12 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1181 STS Save the Sound (Volunteer) 2026-08-18T16:59:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 960 SBWC_WQX Scappoose Bay Watershed Council (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5050 SEAQ Seattle Aquarium 2026-01-10T11:21:34 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1067 SEATTLERIVER_WQX Seattle River 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 391 SSD Security Sanitation District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 734 SELDOVIA Seldovia Village Tribe (Tribal) 2023-08-09T17:26:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 687 21FLSEM_WQX Seminole County (Florida) 2025-10-29T12:44:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 626 STF_WQX Seminole Tribe of Florida (Tribal) 2025-11-08T05:07:05 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 978 SCEQ Seneca Cayuga Nation (Tribal) 2026-08-20T09:17:04 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2550 SLPWA Seneca Lake Pure Waters Association 2021-09-13T08:41:53 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3710 SENECA_WQX Seneca Nation of New York 2023-09-28T18:59:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 610 SMSCGOV_WQX Shakopee Mdewakanton Sioux Community of Minnesota (Tribal) 2026-03-27T13:04:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 845 SHELLYAB_WQX Shell Chemical Yabucoa (Puerto Rico) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2910 SVR Sherwood Valley Band Of Pomo Indians (Tribal) 2026-03-27T13:04:16 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 169 SHINGLESPRINGS_WQX Shingle Springs Rancheria (Tribal) UNREGISTERED 2026-02-26T16:03:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1192 SBITENV_WQX Shoalwater Bay Indian Tribe of the Shoalwater Bay Indian Reservation (Tribal) 2023-08-09T17:26:34 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 673 SHOSHONE_BANNOCK Shoshone-Bannock Tribes (Tribal) 2026-03-27T12:51:03 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1220 SHOSHONE_BANNOCK_WQX Shoshone-Bannock Tribes of the Fort Hall Reservation (Tribal) 2023-08-09T17:26:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1001 SHOPAITR_WQX Shoshone-Paiute Tribes of the Duck Valley Reservation, Nevada (Tribal) 2023-08-09T17:26:46 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 939 SDJSA Silverthorne/Dillon Joint Sewer Authority 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 985 SWO_OEP Sisseton-Wahpeton Sioux Tribe Lake Traverse Reservation (SD) (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 40 SSWCD Siuslaw Soil and Water Conservation District - Lane County 2026-04-02T14:50:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1182 VM_SWC Siuslaw Watershed Council (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 58 SIUSLAW Siuslaw Watershed Council (Volunteer) 2025-06-16T12:36:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 848 SKAGITCOUNTY_WQX Skagit County 2025-12-26T15:59:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5730 WQX_SRSC Skagit River System Cooperative (Volunteer) 2026-03-27T13:06:05 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 591 SKAGITWG_WQX Skagit River Watershed Grant (TNC, SRSC, WWAA) - Washington (Tribal) 2026-08-20T15:25:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4790 SKAGWAYTRADITIONALCOUNCIL_WQX Skagway Traditional Council (Tribal) 2024-10-02T14:22:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 587 SKOKDATA_WQX Skokomish Tribe (Tribal) 2026-08-20T11:34:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1276 SKYHORSETECH Sky Horse Tech LLC 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 521 081575_WQX Slide Mine Boulder County Colorado 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5170 SNOCODCNR_SWM Snohomish County Surface Water Management 2025-12-09T16:37:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 60 SNOQUALM_WQX Snoqualmie Indian Tribe (Tribal) 2026-04-08T14:26:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 128 SOBOBA_WQX Soboba Band of Luiseno Indians, California (Tribal) 2026-08-20T12:38:16 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3210 BENTON_SWCD Soil and Water Conservation District - Benton County 2026-01-28T15:28:23 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 161 COLUMBIA_SWCD Soil and Water Conservation District - Columbia County 2026-03-20T21:06:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 800 GILLIAM_SWCD Soil and Water Conservation District - Gilliam County 2026-04-29T23:33:01 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 338 LSWCD_WQX Soil and Water Conservation District - Lincoln County 2026-07-06T23:40:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 233 SOKAOGON_WQX Sokaogon Chippewa Community (Tribal) 2026-03-27T13:04:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1245 SRCD Solano Resource Conservation District (Volunteer) 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3970 SONOMAWATER_WQX Sonoma Water 2026-05-21T13:59:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3090 SC-NJ Sourland Conservancy (Volunteer) 2026-01-28T15:46:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 703 SACWSD_WQX South Adams County Water and Sanitation District (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 300 SBWA South Branch Watershed Assoc (Volunteer)* 2025-08-18T15:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 287 SBWA1 South Branch Watershed Association (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 175 SCCWK South Carolina Charleston WaterKeeper (Volunteer)* 2026-03-27T13:53:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1153 SCCRK South Carolina Congaree RiverKeeper (Volunteer) 2026-07-27T14:56:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1200 21SCBCH_WQX South Carolina Department of Environmental Services 2026-01-08T14:27:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 957 21SC60WQ_WQX South Carolina Department of Environmental Services 2026-06-11T06:50:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 492 21SCSHL_WQX South Carolina Department of Environmental Services 2024-07-25T11:02:34 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 790 SC&LRWC South Coast and Lower Rogue Watershed Councils (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1232 SDDENR_WQX South Dakota Department of Environment and Natural Resources 2024-09-10T07:55:24 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 242 SDGEO_WQX South Dakota Geological Survey 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 779 21FLSFWM_WQX South Florida Water Management District 2025-11-06T15:27:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 396 SFBED_WQX South Fork Band Environmental Department (Tribal) 2025-01-28T17:47:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 683 21FLSGCSP South Gulf Cove Sampling Project 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 167 SJLWT South Jersey Land and Water Trust (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 581 SOUTHSANTIAM_WC South Santiam Watershed Council (Volunteer) 2025-06-16T12:35:59 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2970 UT0024384_WQX South Valley Water Reclamation Facility 2022-06-23T10:23:55 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1003 SNSA_WQX Southeastern Natural Sciences Academy (Georgia) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1257 21CABCH Southern California Coastal Water Research Project (BEACH) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1070 SOU_WQX Southern Oregon University 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1221 SOUTHUTE Southern Ute Tribe 2026-07-14T00:52:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 695 21FLSWFD_WQX Southwest Florida Water Management District 2025-11-05T08:09:58 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 895 SWFMDDEP_WQX Southwest Florida Water Management District (FLDEP) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 468 SPC Sparkill Creek Watershed Alliance (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5651 UTAMPASEL Spatial Ecology Lab at The University of Tampa 2025-11-24T18:50:22 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 117 SPIRITLK Spirit Lake Tribal EPA Programs (Tribal) 2026-08-20T12:37:34 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1249 SRRTFF Spokane River Regional Toxics Task Force (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1129 R10MIDNITE Spokane Tribe of the Spokane Reservation (Tribal) 2026-03-27T12:52:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 285 STOI Spokane Tribe of the Spokane Reservation (Tribal) 2026-06-01T14:18:35 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 115 SQUAXIN Squaxin Island Tribe (Tribal) 2024-10-15T15:05:11 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 48 21FLSJWM_WQX St. Johns River Water Management District 2025-11-03T16:59:30 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 332 ST_CROIX_WQX***RENAMED*** St. Croix Chippewa Indians of Wisconsin (Tribal) 2026-08-20T12:48:27 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 735 STCROIX_WQX St. Croix Chippewa Indians of Wisconsin (Tribal) 2026-08-20T10:43:03 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 146 STJOHNSRIVERKPR_WQX St. Johns Riverkeeper (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 430 SLU_WQX St. Louis University 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 600 SRSTEPA Standing Rock Sioux Tribe 2026-08-22T01:21:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 554 STANDLEY Standley Lake Watershed Group (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 63 MEIYINWUSUNYPLATTSBURGH State University of New York at Plattsburgh 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 527 AWQDECJN State of Alaska, Department of Environmental Conservation 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 998 WYDEQ_Watershed State of Wyoming Department of Environmental Quality Watershed Program 2026-02-13T12:58:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 316 WYDEQ_WQX State of Wyoming Department of Environmental Quality Watershed Program 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 724 WASIT Stillaguamish Tribe of Indians of Washington (Tribal) 2025-06-12T18:38:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 628 STOCKBRIDGE_MUNSEE Stockbridge_Munsee Community (Tribal) 2026-08-20T09:17:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 293 SBS Stockton Boro School 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1036 SUMFS Stockton University Marine Field Station 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 159 SBMWA Stony Brook-Millstone Watershed Association (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 74 SMIE Stream Monitoring Information Exchange (TN) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1096 STROUD_WQX Stroud Water Research Center (Pennsylvania) (Volunteer)* 2025-08-18T15:52:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 558 SCDHSECOLOGY Suffolk County Department of Health Ecology (New York) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1060 SCWA Suffolk County Water Authority 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4030 SUMMITLAKETRIBE Summit Lake Paiute Tribe (Tribal) 2025-12-29T13:52:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 938 SWQC Summit Water Quality Committee 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 710 0801194_WQX Summitville Superfund site (US EPA Region 8) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 356 SUNENCO Suncor Energy (USA) Inc. (Colorado) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1110 BOUNTIFL_WQX Superfund Bountiful UT 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 195 INTRMTN_WQX Superfund Intermountain Waste Oil Refinery 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1222 SUQUAMISH Suquamish Indian Tribe of the Port Madison Reservation (Tribal) 2023-08-09T17:26:34 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 625 SIR_WQX Susanville Indian Rancheria, California (Tribal) 2026-01-06T14:45:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 278 42SRBCWQ_WQX Susquehanna River Basin Commission 2026-03-24T12:30:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 82 21FLSUW_WQX Suwannee River Water Management District 2025-11-03T09:12:42 AMERICA/NEW_YORK Sample Collection Method 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Sample Collection Method Context(MethodIdentifierContext) 1292 TRC Omni TRC Omni (NATIONAL) 2021-03-27T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1223 TABLEMOUNTAINRANCHERIA_WQX Table Mountain Rancheria of California (Tribal) 2026-06-26T16:18:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 393 TPCHD_WQX Tacoma-Pierce County Health Department (Washington) 2023-01-20T13:33:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2750 TAKSHANUK Takshanuk Watershed Council (Volunteer) 2025-08-18T15:52:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 645 21FLTBW_WQX Tampa Bay Water 2025-11-05T08:43:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5370 TECK_AMERICAN Teck American Incorporated 2025-04-28T14:35:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1174 TLBP_WQX Tenmile Lakes Basin Partnership (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 690 TDECDOE_WQX Tennessee Department Of Environment And Conservation 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 862 TDECWPC_WQX Tennessee Department Of Environment And Conservation 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1291 TN DEC Tennessee Department of Environment and Conservation (NATIONAL) 2021-03-27T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 552 THD_LAB Tennessee Department of Health Division of Laboratory Services 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 716 TGENVIRO TerraGraphics Environmental Engineering, Inc. 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 815 TEST_SD Test Import for State of South Dakota 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 750 DEMOTEST Test Organization (Volunteer) 2022-12-07T07:46:28 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1024 OST_SHPD_TEST Testing Account For USEPA, Office of Water, Office of Science and Technology, Standards and Health Protection Division 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 443 TTFFX Tetra Tech Fairfax, VA 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 644 TETRATECH Tetra Tech, Inc. 2026-01-29T18:36:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3370 TAMUCC Texas A&M University-Corpus Christi 2026-06-16T12:14:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 745 TCEQMAIN Texas Commission on Environmental Quality 2026-08-15T10:15:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1290 TCEQ Texas Commission on Environmental Quality (NATIONAL) 2021-03-27T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 623 21TXBCH Texas General Land Office 2026-08-14T17:26:56 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 371 TXSTRMTM_WQX Texas Stream Team 2026-03-09T12:17:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 637 CADMUS The Cadmus Group (Massachusetts) (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 164 CHOCNATWQX The Choctaw Nation of Oklahoma (Tribal) 2026-04-06T15:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 466 21FLCONS_WQX The Conservancy of Southwest Florida 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3170 TLGVWQMPROGRAM The Last Green Valley Inc (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 91 BERGERGROUP The Louis Berger Group, Inc. 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 769 MUSCOGEE_CREEK The Muscogee (Creek) Nation (Tribal) 2023-08-09T17:26:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2730 TNCAZ_WQX The Nature Conservancy - Arizona (Volunteer)* 2025-08-18T15:52:49 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 582 HUIWAIOLA_WQX The Nature Conservancy - Honolulu (Volunteer)* 2026-01-23T21:19:44 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 355 TNCNJ_WQX The Nature Conservancy NJ Office(Volunteer)* 2026-02-16T13:46:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1233 21FLKTNC_WQX The Nature Conservancy of the Florida Keys 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 813 OSAGENTN_WQX The Osage Nation (Tribal) 2023-08-09T17:26:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 732 OSAGENTN The Osage Nation (Tribal) 2023-08-09T17:26:52 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 842 QUAPAWTR_WQX The Quapaw Tribe of Indians (Tribal) 2023-08-09T17:26:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 844 SNEPO_WQX The Seminole Nation of Oklahoma (Tribal) 2023-08-09T17:26:51 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2790 TWI The Watershed Institute (Volunteer) 2024-08-29T16:29:42 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 405 MHA_WQX Three Affiliated Tribes of the Fort Berthold Reservation, North Dakota (Tribal) 2023-08-09T17:26:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 982 MHA_NATN Three Affiliated Tribes: Mandan, Hidatsa, and Arikara Nation (Tribal) 2026-03-27T13:04:15 AMERICA/NEW_YORK Sample Collection Method 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4370 W3STON2024WQX Weston Solutions 2025-06-05T15:58:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 3130 WHATCOMCD Whatcom Conservation District (Volunteer) 2025-06-16T12:55:31 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 375 WHATCOM_WQX Whatcom County Public Works 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1259 WHITEMOUNTAIN_WQX White Mountain Apache Tribe of the Fort Apache Reservation, Arizona (Tribal) 2026-07-27T16:02:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 507 WRFOBLM White River Field Office - BLM (Volunteer) 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 331 WDEP_WQX Wichita Department of Environmental Programs (Tribal) 2026-02-27T15:58:53 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 739 WICHITAEPA_WQX Wichita and Affiliated Tribes (Wichita, Keechi, Waco & Tawakonie), Oklahoma (Tribal) 2025-06-30T16:50:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 152 WWSD Widefield Water and Sanitation District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5110 WILDFISHCONSERVANCY_WA Wild Fish Conservancy (Washington) 2025-03-06T21:45:37 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 548 WILLOWCREEK Willow Creek Reclamation Committee (Volunteer)* 2025-08-18T15:52:50 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 748 WREQC_WQX Wind River Environmental Quality Commission 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 157 WINDWARDENV_WQX Windward Environmental 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 884 WINNEBAGO07 Winnebago Tribe of Nebraska (Tribal) 2023-08-09T17:26:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 615 WINNEBAGO07_WQX Winnebago Tribe of Nebraska (Tribal) 2024-09-11T12:35:40 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1147 WIDATCP_WQX Wisconsin Department of Agriculture, Trade and Consumer Protection 2026-02-27T15:12:41 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 762 21WIBCH Wisconsin Department of Natural Resources 2026-03-19T10:24:12 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 744 WIDNR_WQX Wisconsin Department of Natural Resources 2026-08-25T05:25:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 319 WIYOT_WQX Wiyot Tribe, California (Tribal) 2025-11-21T16:05:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4291 WTGHA Wompanoag Tribe of Gay Head Aquinnah (Tribal) 2024-10-15T15:05:14 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1243 WOOD Wood PLC 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 629 WC_WQX Woodard and Curran 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 153 WMHMD Woodmen Hills Metropolitan District 2021-03-05T17:58:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 834 WWMD_VA World Water Monitoring Day Virginia (Volunteer) 2026-03-16T17:43:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 317 WNENVDPT_WQX Wyandotte Nation (Oklahoma) (Tribal) 2026-08-20T12:33:36 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5410 WYDEQ Wyoming Department of Environmental Quality (NATIONAL) Context for WYDEQ methods to be made publicly available. 2025-06-11T00:00:00 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5190 WYOMING_EXTERNAL Wyoming External Non-WYDEQ entities 2025-03-11T14:31:28 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1133 YAKIMAVLYDAIRIES_WQX Yakima Valley Dairies 2022-04-08T12:03:27 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 5430 YANKTONSIOUX_WQX Yankton Sioux Tribe (Tribal) 2026-03-27T13:04:16 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2591 YPIT_WQX Yavapai Prescott Indian Tribe, Arizona (Tribal) 2026-06-09T22:58:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1225 YAN_WQX Yavapai-Apache Nation of the Camp Verde Indian Reservation, Arizona (Tribal) 2026-04-16T13:56:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 269 YERINGTON_WQX Yerington Paiute Tribe of the Yerington Colony & Campbell Ranch, Nevada (Tribal) 2023-08-09T17:26:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1258 YOMBA Yomba Shoshone Tribe of the Yomba Reservation, Nevada (Tribal) 2023-08-09T17:26:47 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 2470 YRITWC Yukon River Inter-Tribal Watershed Council (Tribal) 2023-08-09T17:26:43 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 746 YUROKTEP_WQX Yurok Tribe of the Yurok Reservation, California (Tribal) 2026-02-24T13:51:38 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 4830 ZENDERGROUP_WQX ZenderGroup.org 2024-10-15T10:49:39 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 31 ZIAPUEBLO_WQX Zia Pueblo 2026-07-27T17:55:45 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 1176 IL_EPA_WQX illinois epa 2026-02-18T18:00:48 AMERICA/NEW_YORK Sample Collection Method Context(MethodIdentifierContext) 766 TESTGCSWQX testGCSWQX 2021-03-05T17:58:39 AMERICA/NEW_YORK