The advisories impact large areas of Idaho, Oregon, Montana and Washington, lasting through the end of January.

DEQ air monitoring stations showed "moderate" air quality across most of Portland Wednesday morning. It's expected to rapidly ...

The Dyson HEPA Big + Quiet air purifier is on sale at Amazon for $599.99, down from the normal price of $899.99. That's a 33% discount.

Air quality in Pittsburgh is improving, according to year-over-year data. Why it matters: Long-term exposure to poor air quality is harmful to your health and has been a problem in Pittsburgh for ...

Specialized air quality instruments captured a spike in lead, chlorine, and bromine pollution during the L.A. wildfires.