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.

Several U.S. cities are experiencing heightened air pollution levels on Wednesday, including parts of Chicago.

Despite improvements in air quality in past decades, 156 million Americans still breathe in too much soot or ozone, says the ...

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 ...