The Pennsylvania county where an explosion at a U.S. Steel plant south of Pittsburgh killed two people and injured more than ...

The Allegheny County Health Department announced that Mobile Air Units will be deployed in the Mon Valley Thursday and Friday ...

The Allegheny County Health Department issued an update on air quality near the U.S. Steel Clairton Coke Works following ...

Organizations like the Breathe Project and the Group Against Smog and Pollution, in conjunction with the Allegheny County Health Department, have been closely monitoring the air quality in Clairton ...

Wildfires are burning across the Western United States and Canada, affecting large parts of the country as smoke drifts. With ...

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

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 ...

While the smoke is worst along the Western Slope where the fires are burning, levels are also fluctuating on the Front Range.

Official air-quality results for Kyrene de la Sierra Elementary School show elevated levels of potentially harmful chemicals.

Despite thick smoke in the sky today in southern Colorado, air quality alerts haven't been issued - instead they've been in the western slope. In fact - sometimes invisible compounds pose more risk.

The City Council dropped a $202 million effort that would have expanded the city’s cooling centers to also accommodate people ...

Researchers at The University of Alabama in Huntsville (UAH) have published a paper in Communications Earth & Environment ...