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 sub-committee of the Commission for Air Quality Management (CAQM) has determined to implement all measures outlined in ...

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

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

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

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

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

As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.

Calm winds, low temperatures and foggy conditions allow accumulation of pollutants in the region, with the air quality index ...

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