The National Emissions Inventory (NEI) is a comprehensive and detailed estimate of annual total air emissions of both criteria and hazardous air pollutants (HAPs) from all air emissions sources.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- 2020 NEI Plan (PDF)(56 pp, 1 MB)
- Appendix 1 - Cross dataset selection rules (PDF)(17 pp, 419 K)