| AEDT |
Aviation Environmental Design Tool |
| AERR |
Air Emissions Reporting Rule |
| APU |
Auxiliary power unit |
| BEIS |
Biogenics Emissions Inventory System |
| C1 |
Category 1 (commercial marine vessels) |
| C2 |
Category 2 (commercial marine vessels) |
| C3 |
Category 3 (commercial marine vessels) |
| CAMD |
Clean Air Markets Division (of EPA Office of Air and Radiation) |
| CAP |
Criteria Air Pollutant |
| CBM |
Coal bed methane |
| CDL |
Cropland Data Layer |
| CEC |
North American Commission for Environmental Cooperation |
| CEM |
Continuous Emissions Monitoring |
| CERR |
Consolidated Emissions Reporting Rule |
| CFR |
Code of Federal Regulations |
| CH4 |
Methane |
| CMU |
Carnegie Mellon University |
| CMV |
Commercial marine vessels |
| CNG |
Compressed natural gas |
| CO |
Carbon monoxide |
| CO2 |
Carbon dioxide |
| CSV |
Comma Separated Variable |
| E10 |
10% ethanol gasoline |
| EDMS |
Emissions and Dispersion Modeling System |
| EF |
emission factor |
| EGU |
Electric Generating Utility |
| EIS |
Emission Inventory System |
| EAF |
Electric arc furnace |
| EF |
Emission factor |
| EI |
Emissions Inventory |
| EIA |
Energy Information Administration |
| EMFAC |
Emission FACtor (model) – for California |
| EPA |
Environmental Protection Agency |
| ERG |
Eastern Research Group |
| ERTAC |
Eastern Regional Technical Advisory Committee |
| FAA |
Federal Aviation Administration |
| FACTS |
Forest Service Activity Tracking System |
| FCCS |
Fuel Characteristic Classification System |
| FETS |
Fire Emissions Tracking System |
| FWS |
United States Fish and Wildlife Service |
| FRS |
Facility Registry System |
| GHG |
Greenhouse gas |
| GIS |
Geographic information systems |
| GSE |
Ground support equipment |
| HAP |
Hazardous Air Pollutant |
| HCl |
Hydrogen chloride (hydrochloric acid) |
| Hg |
Mercury |
| HMS |
Hazard Mapping System |
| ICR |
Information collection request |
| I/M |
Inspection and maintenance |
| IPCC |
Intergovernmental Panel on Climate Change |
| IPM |
Integrated Planning Model |
| LRTAP |
Long-range Transboundary Air Pollution |
| LTO |
Landing and takeoff |
| LPG |
Liquified Petroleum Gas |
| MARAMA |
Mid-Atlantic Regional Air Management Association |
| MATS |
Mercury and Air Toxics Standards |
| MCIP |
Meteorology-Chemistry Interface Processor |
| MMT |
Manure management train |
| MOBILE6 |
Mobile Source Emission Factor Model, version 6 |
| MODIS |
Moderate Resolution Imaging Spectroradiometer |
| MOVES |
Motor Vehicle Emissions Simulator |
| MW |
Megawatts |
| MWC |
Municipal waste combustors |
| NAA |
Nonattainment area |
| NAAQS |
National Ambient Air Quality Standards |
| NAICS |
North American Industry Classification System |
| NASS |
USDA National Agriculture Statistical Service |
| NATA |
National Air Toxics Assessment |
| NCD |
National County Database |
| NEEDS |
National Electric Energy Data System (database) |
| NEI |
National Emissions Inventory |
| NESCAUM |
Northeast States for Coordinated Air Use Management |
| NFEI |
National Fire Emissions Inventory |
| NG |
Natural gas |
| NH3 |
Ammonia |
| NMIM |
National Mobile Inventory Model |
| NO |
Nitrous oxide |
| NO2 |
Nitrogen dioxide |
| NOAA |
National Oceanic and Atmospheric Administration |
| NOx |
Nitrogen oxides |
| O3 |
Ozone |
| OAQPS |
Office of Air Quality Standards and Planning (of EPA) |
| OEI |
Office of Environmental Information (of EPA) |
| ORIS |
Office of Regulatory Information Systems |
| OTAQ |
Office of Transportation and Air Quality (of EPA) |
| PADD |
Petroleum Administration for Defense Districts |
| PAH |
Polycyclic aromatic hydrocarbons |
| Pb |
Lead |
| PCB |
Polychlorinated biphenyl |
| PFAS |
Per- and polyfluoroalkyl substances |
| PM |
Particulate matter |
| PM25-CON |
Condensable PM2.5 |
| PM25-FIL |
Filterable PM2.5 |
| PM25-PRI |
Primary PM2.5 (condensable plus filterable) |
| PM2.5 |
Particulate matter 2.5 microns or less in diameter, synonymous with PM25-PRI |
| PM10 |
Particular matter 10 microns or less in diameter, synonymous with PM10-PRI |
| PM10-FIL |
Filterable PM10 |
| PM10-PRI |
Primary PM10 (condensable plus filterable) |
| POM |
Polycyclic organic matter |
| POTW |
Publicly Owned Treatment Works |
| PSC |
Program system code (in EIS) |
| RFG |
Reformulated gasoline |
| RPD |
Rate per distance |
| RPP |
Rate per profile |
| RPV |
Rate per vehicle |
| RVP |
Reid Vapor Pressure |
| Rx |
Prescribed (fire) |
| SCC |
Source classification code |
| SEDS |
State Energy Data System |
| SFv1 |
SMARTFIRE version 1 |
| SFv2 |
SMARTFIRE version 2 |
| S/L/T |
State, local, and tribal (agencies) |
| SMARTFIRE |
Satellite Mapping Automated Reanalysis Tool for Fire Incident Reconciliation |
| SMOKE |
Sparse Matrix Operator Kernel Emissions |
| SO2 |
Sulfur dioxide |
| SO4 |
Sulfate |
| TAF |
Terminal Area Forecasts |
| TRI |
Toxics Release Inventory |
| UNEP |
United Nations Environment Programme |
| UNFCCC |
United Nations Framework Convention on Climate Change |
| USDA |
United States Department of Agriculture |
| VMT |
Vehicle miles traveled |
| VOC |
Volatile organic compounds |
| USFS |
United States Forest Service |
| WebFIRE |
Factor Information Retrieval System |
| WLF |
Wildland fire |
| WRAP |
Western Regional Air Partnership |
| WRF |
Weather Research and Forecasting Model |