United States Environmental Protection Agency
National Emissions Inventory (NEI)
2020 Report Dashboard
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Trend Notes
  • Emission trends are shown for the CAPs and five HAPs in the NEI that are examples of toxic air pollutants with widespread concern to public health.
  • Emissions from wildfires are included in the trends 2002-2020 and vary considerably from year-to-year and across states.
  • For the National trend, prescribed fires are summed with industrial and other processes under stationary sources, and for state trends prescribed fires are listed separately within stationary sources.
  • The trends procedural documentation website has more information about the estimation procedures for air pollutant emission trends.
  • The unit of measure is short tons.
How-to
Source: U.S. EPA National Emission Inventories
Download Trends Data (19 KB)
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Emissions shown account for 99% of NEI emissions for each pollutant based on a ton threshold of >=.00025.

For best practice, map county or tribal land emissions one pollutant at a time.

The unit of measure is short tons.

How-to
Source: U.S. EPA National Emissions Inventory 2020
Download Sector Data (106 MB)
Map Legend
Map Color Options

Emissions shown account for 99% of NEI emissions for each pollutant based on a ton threshold of >=.00025.

For best practice, map county or tribal land emissions one pollutant at a time.

The unit of measure is short tons.

How-to
Source: U.S. EPA National Emissions Inventory 2020
Download Process Data (152 MB)

Operating point sources shown account for +95% of point source emissions for each pollutant based on the following ton thresholds:

  • Chromium VI Compounds >= .001
  • Acrolein, Benzene, Ethylene Oxide, Lead >= .01
  • Formaldehyde >= .5
  • All other pollutants >= 5

Portable and federal water facilities are excluded.

The unit of measure is short tons.

How-to
Source: U.S. EPA National Emissions Inventory 2020
Download Point Source Data (18 MB)
How-to