An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Air Emissions Modeling

2014 Version 7.1 Technical Support Document (TSD)

This TSD describes how the emission inventories were prepared for air quality modeling for the year 2014 using the 2014, version 7.1 emissions modeling platform. This platform is based on the 2014 National Emissions Inventory, Version 2. It was used for final modeling for the 2014 National Air Toxic Assessment (NATA).

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.