Air Emissions Inventories
So you want to know more about the NEI...
Whether you want to get data, report data, or just know more about the National Emissions Inventory, you've come to the right place.
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Get Emissions Data
Summaries, reports, and detailed data from the National Emissions Inventory (NEI), modeling platforms, and emissions trends.
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Report Emissions Data
Resources for State, Local, and Tribal Entities on requirements for reporting under the Air Emissions Reporting Rule (AERR), and for Industry Owners & Operators reporting using the Combined Air Emissions Reporting System (CAERS).
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General Emissions Inventory Information
More information about the methods and science, SIP emissions guidance, conferences, and training.