The Oregon Department of Environmental Quality issued an air quality advisory for Wednesday for Klamath and Jefferson ...

A haze of smoke from wildfires burning in Colorado wafted into counties along the Interstate 70 mountain corridor on Wednesday, prompting an air quality health advisory. The smoke is from four ...

Thousands of people across one state were told to go inside if they start experiencing respiratory symptoms such as coughing.

The Minnesota Pollution Control Agency released the top hourly fine particle readings from the air quality alert that ran ...