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11347319 
Data & Software 
2020 National Emissions Inventory (NEI) Data (August 2023 version) 
U.S. Environmental Protection Agency :: U.S. EPA 
2023 
US Environmental Protection Agency 
Washington, DC 
English 
The 2020 NEI includes air emissions sources of both criteria and hazardous air pollutants, and data are available for many facilities and county totals. The Emissions Inventory System (EIS) helps the EPA to build the NEI. 
12/05/2023 
August 2023