An air quality advisory has been issued for Friday in the Santa Clarita Valley and other areas of Los Angeles due to smoke ...

Air quality in Los Angeles has improved as the Palisades and Eaton wildfires get under control. But as the fires burned through houses, cars and industrial areas, they spewed out vast amounts of ...

The U.S. has one of the world’s most advanced systems to monitor air pollutants. Can it keep up with a changing climate?

Thousands of people in southern California were advised to remain indoors as "emergency" air quality conditions hit parts of the Coachella Valley.

As if Southern Californians needed something else to worry about, dangerous air quality is threatening parts of the region. Hazardous air quality has been detected near La Cañada Flintridge and ...

This West Coast city earned the top spot in the list of smoggiest U.S. cities, but visitors don't seem to be fazed by the haze.

High pressure over Southern California is expected to bring continued hot weather and poor air quality through the beginning of the week. “I talk about air quality quite a bit when we talk about ...

Wildfires create chaos throughout Los Angeles. Entire communities are set aflame, thousands are under evacuation orders, and city/state leadership is being questioned.

The Los Angeles metro is once again the worst for ozone in the nation, ... the lowest grade possible and reflective of a poor score that involves the Air Quality Index.

"Measurements like the air-quality index, or AQI, don't tell you the composition of the smog, what it's made of," Wennberg says. "It's important for us to know the breakdown of chemicals in the air.