OUR NATION'S AIR


TRENDS THROUGH 2023

Welcome!

For more than 50 years, the U.S. Environmental Protection Agency has maintained its commitment to protecting public health by reducing pollutant emissions and improving air quality. This annual report, titled Our Nation's Air, summarizes the nation's air quality status and trends through 2023.

Sections of this report convey information across different time periods, depending on the underlying data sources. While some are consistently available since 1970, like growth data, our longer-term trends for air quality concentrations start in 1990, when monitoring methodologies became more consistent.

Please read and enjoy the full report below, and be sure to download and share the one page summary using the share button at the top. Additional detail on air trends can be found at EPA's AirTrends website.

Scroll down to read more or use the top menu to jump to a topic. If you encounter any issues viewing content, update or try opening the website in another browser.

United States Environmental Protection Agency