Because of Canadian wildfires, Minnesota high schools have had to watch how they practice to begin the season in a number of ...

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

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

The Minnesota Pollution Control Agency extended an air quality alert for southeastern and northern Minnesota on Tuesday due ...

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 ...

An air quality alert was reported by the National Weather Service on Tuesday at 9:10 a.m. in effect until 11 p.m. for Western ...

On Tuesday at 8:20 a.m. the National Weather Service reported an air quality alert in effect until 11 p.m. for Passaic, ...

The Air Quality Advisory issued by the Department of Environmental Protection is not the result of wildfire smoke, as it was ...

A final air quality report has revealed details about the chemical odor that forced Kyrene de la Sierra Elementary School to ...

An air quality advisory has been issued for the Bay Area amid concerns about wildfire smoke drifting into the region.

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

State and federal agencies recommend several steps to keep indoor air cleaner during wildfire smoke events: Upgrade your air ...