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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Estimated U.S. Emissions of Carbon Monoxide

(million short tons)

Embedded Dataset Excel:

Dataset Excel:

table_04_45_102826.xlsx (30.31 KB)

Notes:

Details may not add up to totals due to rounding in the source.

The February 2025 emissions trends release updates data methodologies across several periods: it retains improved estimation procedures introduced in 2023 for 2002–2019 to ensure consistency, uses the 2020 National Emissions Inventory (NEI) alongside modeling platforms for 2020–2022, incorporates the updated 2023 NEI, carries 2023 data forward for most 2024 figures, and introduces 2025 estimates focused primarily on power plant emissions (NOx​ and SO2​) and draft wildfire data while carrying 2024 estimates forward for all other categories.

Description:

KEY: P = preliminary; R = revised. 

a Industrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, other industrial processes; and solvent utilization, storage, and transport.

 

Source:

U.S. Environmental Protection Agency, Air Emissions Inventories, Air Pollutant Emissions Trends Data, National Tier 1 CAPS Trends, available at https://www.epa.gov/air-emissions-inventories/air-pollutant-emissions-trends-data as of Sep. 28, 2026.

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