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

Winds could blow smoke from the Bear Gulch fire burning on the Olympic Peninsula, bringing the potential for unhealthy air ...

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

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 advisory has been issued for Mason County as the Bear Gulch Fire continues to burn north of Lake Cushman.

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

At 8:13 a.m. on Tuesday, the National Weather Service reported an air quality alert in effect until 11 p.m. for Morris, ...

OLYMPIC NATIONAL FOREST, Wash. — The Bear Gulch Fire within the Olympic National Forest and National Park has now prompted an ...

New York City and the Lower Hudson Valley are on alert for poor air quality once again on Tuesday, Gov. Kathy Hochul ...

If you live in the Houston area, you might have noticed that air quality alerts are issued throughout the year by the U.S.