National Emissions Inventory (NEI)
Organization
Environmental Protection Agency (EPA)
Description
- Estimate of air emissions of criteria pollutants, criteria precursors, and hazardous air pollutants from air emissions sources
- Emissions estimates from point sources (e.g. large industrial facilities, electric power plants, airports), nonpoint sources (e.g. residential heating, commercial combustion, asphalt paving), onroad sources (e.g. light duty vehicles, heavy duty vehicles), nonroad sources (e.g. construction equipment, lawn and garden equipment, locomotives), and event sources (e.g. fires)
Vintage/Release Frequency
Annual 1996-2005 and Triennial since 2008
Observational Unit
County level
Collection Methodology
- Data provided by State, Local, and Tribal air agencies for sources in their jurisdictions and supplemented by data developed by the US EPA
- Built using the Emissions Inventory System (EIS) first to collect the data from State, Local, and Tribal air agencies and then to blend that data with other data sources
User Guide/Data Dictionary
Supporting documentation available at the same website as data download
Proposal or Application required?
No