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.
- 2017 NEI Plan Revised (PDF)(36 pp, 859 K)
- Appendix 5 - Cross dataset tagging proposed rules (PDF)(15 pp, 278 K)
- Appendix 6 - Option Group Option Set Enhancement EIS Requirements (PDF)(6 pp, 209 K)