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

An air quality alert was issued by the National Weather Service in Mount Holly at 9:43 a.m. on Friday, Aug. 15.

High school coaches and administrators across Minnesota have been asked to be aware of air-quality levels as athletes return ...

The Trump administration is backing a trucking industry lawsuit against the state’s plan to lower emissions and switch to electric vehicles.

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

While not everyone will be impacted by air quality on Wednesday, those who have been sensitive to poor air quality this ...

Air quality alerts are in place again for the entire Western Slope as firefighters battle more than 20 fires. The Colorado ...

Air quality alerts are in place again for the entire Western Slope as firefighters battle more than 20 fires. The Colorado ...

Some regions of Louisiana are known for having the worst air quality, but other areas are said to have the best. Here's where the best air quality is.