Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn’t breathe a ...

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

Already known for having some of the worst air quality in the U.S., people in Southern California are now also at risk of ...

Some studies have indicated that young children, especially those under the age of 4, are at particular risk because their ...

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