On Tuesday at 9:13 a.m. the Nation Service reported an updated air quality alert in effect until 11 p.m. for Passaic, Hudson, Bergen, Essex and Union counties.

The Perseids will peak again Tuesday with mostly clear skies on tap. But will haze and a somewhat full moon play spoiler?

An explosion at U.S. Steel's Clairton Coke Works near Pittsburgh killed 2 and injured 10+, prompting investigations and safety concerns.

An explosion at a U.S. Steel plant near Pittsburgh left two dead and sent at least 10 to hospitals Monday and heavily damaged ...

The Oregon Department of Environmental Quality has issued an air quality advisory for the greater Portland region through ...

After a fatal explosion at U.S. Steel’s Clairton Coke Works, Mon Valley residents remain cautious though Allegheny County ...

Ozone pollution in Portland, Gresham and other cities could reach unhealthy levels for sensitive groups Tuesday afternoon.

An interesting graphic produced by World Visualized ranks the nations with the worst air quality, measured by average ...

The air we breathe is getting worse here in the Lehigh Valley, according to the American Lung Association's State of the Air report.

An air quality alert was reported by the National Weather Service on Tuesday at 12:17 p.m. in effect until 8 p.m. for ...

The CEO of U.S. Steel, Pennsylvania Gov. Josh Shapiro and the director of United Steel Workers will provide an update following the deadly explosion at the Clairton Coke plant.