National Aquifer(NationalAquiferCode) 2 N100AKUNCD Alaska unconsolidated-deposit aquifers Unconsolidated-deposit aquifers (Alaska). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 3 N100ALLUVL Alluvial aquifers See note in History. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 5 N100BSNRGB Basin and Range basin-fill aquifers Basin and Range basin-fill aquifers (southwestern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 9 N100CACSTL California Coastal Basin aquifers California Coastal Basin aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 17 N100CMBPLB Columbia Plateau basin-fill aquifers Columbia Plateau basin-fill aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 55 N100GLCIAL Sand and gravel aquifers (glaciated regions) Sand and gravel aquifers of alluvial and glacial origin (North of the line of glaciation). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 23 N100HGHPLN High Plains aquifer High Plains aquifer. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 31 N100MSRVVL Mississippi River Valley alluvial aquifer Mississippi River Valley alluvial aquifer. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 43 N100PCFNWB Pacific Northwest basin-fill aquifers Pacific Northwest basin-fill aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 44 N100PCFNWV Pacific Northwest volcanic-rock aquifers Pacific Northwest basaltic-rock aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 47 N100PCSRVR Pecos River Basin alluvial aquifer Pecos River Basin alluvial aquifer (Texas and New Mexico). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 56 N100SYMOUR Seymour aquifer Seymour aquifer (Texas). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 69 N100WLMLWD Willamette Lowland basin-fill aquifers Willamette Lowland basin-fill aquifers (Oregon). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 1 N300ADAVMS Ada-Vamoosa aquifer Ada-Vamoosa aquifer (Oklahoma). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 12 N300CNRLOK Central Oklahoma aquifer Central Oklahoma aquifer. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 15 N300COPLTS Colorado Plateaus aquifers Colorado Plateaus aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 19 N300ERLMZC Early Mesozoic basin aquifers Early Mesozoic basin aquifers (eastern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 25 N300JCBSVL Jacobsville aquifer Jacobsville aquifer (Michigan). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 27 N300LCRTCS Lower Cretaceous aquifers Lower Cretaceous aquifers (northern Great Plains). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 28 N300LTRTRY Lower Tertiary aquifers Lower Tertiary aquifers (northern Great Plains). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 29 N300MRSHLL Marshall aquifer Marshall aquifer (Michigan). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 35 N300NYSDSN New York sandstone aquifers New York sandstone aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 48 N300PNSLVN Pennsylvanian aquifers Pennsylvanian aquifers (central and eastern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 54 N300RSHSPG Rush Springs aquifer Rush Springs aquifer (Oklahoma). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 60 N300STHCST South Coast aquifer (Puerto Rico) South Coast aquifer (Puerto Rico). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 66 N300UPCTCS Upper Cretaceous aquifers Upper Cretaceous aquifers (northern Great Plains). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 70 N300WYTRTR Wyoming Tertiary aquifers Upper Tertiary aquifers (Wyoming). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 4 N400ABKSMP Arbuckle-Simpson aquifer Arbuckle-Simpson aquifer (Oklahoma). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 7 N400BISCYN Biscayne aquifer Biscayne aquifer (Florida). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 8 N400BLAINE Blaine aquifer Blaine aquifer (Oklahoma and Texas). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 6 N400BSNRGC Basin and Range carbonate-rock aquifers Basin and Range carbonate-rock aquifers (southwestern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 11 N400CSLHYN Castle Hayne aquifer Castle Hayne aquifer (North Carolina). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 26 N400KNGSHL Kingshill aquifer (Virgin Islands) Kingshill aquifer (Virgin Islands). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 36 N400NCSTLM North Coast Limestone aquifer system (Puerto Rico) North Coast Limestone aquifer system (Puerto Rico). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 34 N400NYNECB New York and New England carbonate-rock aquifers New York and New England carbonate-rock aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 40 N400ORDVCN Ordovician aquifers Ordovician aquifers (Tennessee and Kentucky). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 49 N400PDMBRC Piedmont and Blue Ridge carbonate-rock aquifers Piedmont and Blue Ridge carbonate-rock aquifers (eastern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 50 N400PDMBRX Piedmont and Blue Ridge crystalline-rock aquifers Piedmont and Blue Ridge crystalline-rock aquifers (eastern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 57 N400SLRDVN Silurian-Devonian aquifers Silurian-Devonian aquifers (northern Midwest). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 65 N400UPCRBN Upper carbonate aquifer Upper carbonate aquifer (Minnesota and Iowa). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 32 N500MSSPPI Mississippian aquifers Mississippian aquifers (central and eastern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 46 N500PLOZOC Paleozoic aquifers Paleozoic aquifers (northern Great Plains). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 68 N500VLRDGC Valley and Ridge carbonate-rock aquifers (No longer valid) (Should be included in Valley and Ridge aquifers.). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 67 N500VLYRDG Valley and Ridge aquifers Valley and Ridge aquifers (eastern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 16 N600CMBPLV Columbia Plateau basaltic-rock aquifers Columbia Plateau basaltic-rock aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 22 N600HIVLCC Hawaii volcanic-rock aquifers Hawaiian aquifers (Hawaii). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 33 N600NECRSN New York and New England crystalline-rock aquifers GW Atlas: Crystalline-rock aquifers (New York and New England). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 59 N600SKRVPB Snake River Plain basin-fill aquifers Snake River Plain basin-fill aquifers (Idaho). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 58 N600SKRVPV Snake River Plain basaltic-rock aquifers Snake River Plain basaltic-rock aquifers (Idaho). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 62 N600SRNVDV Southern Nevada volcanic-rock aquifers Southern Nevada volcanic-rock aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 41 N9999OTHER Other aquifers Other aquifers. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 13 S100CNRLVL Central Valley aquifer system Central Valley aquifer system (California). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 14 S100CSLLWD Coastal lowlands aquifer system Coastal lowlands aquifer system (Gulf Coast). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 30 S100MSEMBM Mississippi embayment aquifer system Mississippi embayment aquifer system. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 37 S100NATLCP Northern Atlantic Coastal Plain aquifer system Northern Atlantic Coastal Plain aquifer system. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 39 S100NRMTIB Northern Rocky Mountains Intermontane Basins aquifer systems Northern Rocky Mountains Intermontane Basins aquifer system. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 51 S100PGTSND Puget Sound aquifer system Puget Sound aquifer system (Washington). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 52 S100RIOGRD Rio Grande aquifer system Rio Grande aquifer system. ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 61 S100SECSLP Southeastern Coastal Plain aquifer system Southeastern Coastal Plain aquifer system. ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 63 S100SURFCL Surficial aquifer system Surficial aquifer system (eastern U.S.). ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 64 S100TXCLUP Texas coastal uplands aquifer system Texas coastal uplands aquifer system. ValidDate: 2001-08-01 2019-10-10T10:42:32 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 10 S300CAMORD Cambrian-Ordovician aquifer system Cambrian-Ordovician aquifer system (northern Midwest). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 18 S300DNVRBS Denver Basin aquifer system Denver Basin aquifer system. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 21 S400FLORDN Floridan aquifer system Floridan aquifer system. ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 42 S400OZRKPL Ozark Plateaus aquifer system Ozark Plateaus aquifer system (Missouri). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 53 S400RSWLBS Roswell Basin aquifer system Roswell Basin aquifer system (New Mexico). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 20 S500EDRTRN Edwards-Trinity aquifer system Edwards-Trinity aquifer system (Texas and Oklahoma). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 24 S500INTRMD Intermediate aquifer system GW Atlas: Intermediate aquifer system (Florida). ValidDate: 2001-08-01 2019-10-10T10:42:30 AMERICA/NEW_YORK National Aquifer(NationalAquiferCode) 38 S500NGRTPL Northern Great Plains aquifer system (no longer valid) (Includes four national aquifers but is not considered a national aquifer itself. The component aquifers are Lower Tertiary, Upper Cretaceous, Lower Cretaceous, and Paleozoic.). ValidDate: 2001-08-01 2019-10-10T10:42:31 AMERICA/NEW_YORK