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 This website is no longer updated and links to external websites and some internal pages may not work.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

EIS Bridge Tools

The Bridge Tools (Facility/Point, Nonpoint/Onroad/Nonroad, and Event) are available to State/Local/Tribal agencies for reporting NEI datasets to the Emissions Inventory System.  The bridge tools create XML datasets from Access database templates.  Data can also be imported from the XML format into these Access templates.

Nonpoint / Onroad / Nonroad Bridge Tool(1 pg, 3 MB)

Event Bridge Tool(1 pg, 2 MB)

Facility Point Bridge Tool(1 pg, 4 MB)

The new DRAFT Bridge Tool which accommodates the CERS Schema changes for the 2020 NEI is ready. PLEASE NOTE that this version is a draft version for SLT agencies to use for their own test files and software development. This version of the Bridge Tool should NOT be used for any data submissions at this time. We will release a final version that should be used for inventory years 2020 and beyond.

Draft Facility Point Bridge Tool(4 MB)

Draft Area Bridge Tool(2 MB)