The Air Quality Index, or AQI, is the primary system used to warn the public when air pollution is dangerous. It’s based on ...

The Oregon Department of Environmental Quality issued an air quality advisory Wednesday for Klamath County, southern Lake ...

Several parts of southern California are currently under windblown dust and ash advisories as deadly wildfires continue to ...

Ash from the recent LA County fires and burn scars formed by other wildfires in the fall can be dispersed by strong winds.

The Oregon DEQ has issued an air quality advisory for parts of Oregon due to stagnant air trapping pollutants.

Wildfires are tearing through thousands of acres in Los Angeles County in California, as strong Santa Ana winds stoke the ...

AirNow is a collaborative effort of federal agencies that provides air quality data across the U.S. The site also has ...

The Commission for Air Quality Management (CAQM) in NCR and adjoining areas said it held a review earlier in the day and ...

NCR, authorities have imposed Stage 4 restrictions under the Graded Response Action Plan (GRAP). The air quality index soared ...

Here's what to know about improving your air quality at home during a wildfire—these expert tips help you breathe easier when ...