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 This website is no longer updated and links to external websites and some internal pages may not work.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 Inventories

Emissions Inventory Preparation for Air Quality Modeling (Base Year) (2017 EIC)

The Emissions Inventory Preparation for Air Quality Modeling (Base Year) training will describe how the    emissions inventories used for modeling relate to the National Emissions Inventory (NEI) and how they are processed into formats that are used by air quality models.  Speciation, temporal allocation, and spatial allocation will be discussed along with quality assurance techniques.

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