* Pre-1990 data are unavailable.
Wildfire emissions excluded for all pollutants except for NH₃ pre-2002; PM emissions also exclude miscellaneous emissions (i.e. agricultural dust and prescribed fire emissions).
Citation formats
Air pollutant emissions in the U.S. 1990-2024, by type
Annual emissions of various air pollutants in the United States have experienced dramatic reductions over the past half a century. As of 2024, emissions of nitrogen oxides (NOx) had reduced by more than ** percent since 1970 to *** million tons. Sulfur dioxide (SOâ‚‚) emissions have also fallen dramatically in recent decades, dropping from ** million tons to *** million tons between 1990 and 2024. Air pollutants can pose serious health hazards to humans, with the number of air pollution related deaths in the U.S. averaging * a year.
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Environmental Protection Agency. (April 28, 2025). Air pollutant emissions in the United States from 1970 to 2024, by pollutant (in 1,000 tons) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 23, 2026, from /statistics/1139418/air-pollutant-emissions-by-type-us/
Environmental Protection Agency. "Air pollutant emissions in the United States from 1970 to 2024, by pollutant (in 1,000 tons)." Chart. April 28, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 23, 2026. /statistics/1139418/air-pollutant-emissions-by-type-us/
Environmental Protection Agency. (2025). Air pollutant emissions in the United States from 1970 to 2024, by pollutant (in 1,000 tons). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 23, 2026. /statistics/1139418/air-pollutant-emissions-by-type-us/
Environmental Protection Agency. "Air Pollutant Emissions in The United States from 1970 to 2024, by Pollutant (in 1,000 Tons)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 28 Apr 2025, /statistics/1139418/air-pollutant-emissions-by-type-us/
Environmental Protection Agency, Air pollutant emissions in the United States from 1970 to 2024, by pollutant (in 1,000 tons) ÌÇÐÄÆƽâ°æ, /statistics/1139418/air-pollutant-emissions-by-type-us/ (last visited July 23, 2026)
Air pollutant emissions in the United States from 1970 to 2024, by pollutant (in 1,000 tons) [Graph], Environmental Protection Agency, April 28, 2025. [Online]. Available: /statistics/1139418/air-pollutant-emissions-by-type-us/
