WASHINGTON — Air quality in the D.C. metro area has gotten worse, the American Lung Association said. In this year's "State ...

A new report reveals that Florida’s air remains classified as unhealthy, but conditions haven’t significantly declined in ...

Air quality in Whatcom County got a “D” for 24-hour particle pollution because of wildfire smoke, according to the American Lung Association’s 2025 “State of the Air” report. Other counties across ...

Ranking among the cleanest cities in the nation in terms of air quality in its 2024 report, the ALA now says Des Moines ranks ...

Louisville continues to struggle with poor air quality, according to a new report, as federal support is eroded.

State of the Air grades are based on the number of days a county’s air reaches unhealthful levels on the Air Quality Index.

The American Lung Association reports 156 million Americans, nearly half the country's population, breathe unhealthy air.

Chicago’s air quality is among the worst in the U.S. according to a new ranking, but what’s driving the increase in pollution?

Almost half of everyone who lives in the United States breathes unhealthy levels of air pollution, according to the American ...

American Lung Association’s 2025 annual air quality index gives failing grades to Georgia’s population center for smog and ...

Across the United States, 58% of counties have no active air-quality monitoring sites, according to a new study. Rural counties, especially those in the Midwest and South, are less likely to have ...