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

While the sky has looked opaque today due to wildfire smoke, most of this smoke is elevated above the ground, minimizing air ...

The state Department of Environmental Conservation had issued the Monday alert for 11 a.m. through 11 p.m. due to ozone ...

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

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, ...

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

An air quality alert will be in effect for all of Minnesota until at least 9 a.m. Aug. 12, according to the state Pollution ...

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

A haze of smoke hung over the greater Kelowna area Wednesday, blurring the skyline and offering up the telltale scent of ...

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