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

Poor air quality has been detected in multiple states surrounding California. The state has been hit with multiple deadly ...

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

The air has improved in the LA region as firefighters get blazes under control, but there are questions about how safe the ...

Naturally, people in the Los Angeles area are reaching for their phones to see what the Air Quality Index (AQI) says about ...

The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) ...

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

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily ...

A fire at the Owl Metals recycling facility that caused the Peninsula Expressway to shut down is still causing an air quality ...

Those groups particularly sensitive to particulate matter in the air may want to limit time outside Friday and Saturday.