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

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

An air quality alert was issued on Thursday at 3:31 p.m. in effect until Friday at 7:15 a.m. The alert is for Burke Mountains ...

I’m very happy to say what we studied, what we expected and what we planned for is what seems to be happening,” the MTA’s ...

Toxic smoke and dangerous particulate pollution are spreading far beyond the flames, leaving air quality at unhealthy levels ...

An air quality alert was issued on Tuesday at 5:03 a.m. for Josephine County.

Erin Davis/Axios Visuals Air quality in the Twin Cities is getting worse, according to year-over-year data. Why it matters: Long-term exposure to poor air quality is harmful to your health. By the ...

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 ...

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

To combat rising pollution, the Commission for Air Quality Management (CAQM) reimposed Stage 3 of the Graded Response Action ...

The Ministry of Environment, Urbanization and Climate Change monitors air quality across Türkiye 24/7 with 382 fixed stations ...

Even with thick smoke coming from the Hughes Fire, skies have been clear in many areas, and the air quality forecast has been ...