The LA area is once again the worst for ozone in the U.S., a pollutant impacting millions more people nationwide, the ...

According to nationwide Air Quality Index data maintained by USA TODAY ... USA TODAY This article originally appeared on USA TODAY: Los Angeles air quality and smoke maps: See latest AQI numbers ...

and other environmental health hazards and shared them with the public through the local Air Quality Index. But the monitoring system misses hundreds of harmful chemicals released in urban fires, and ...

As fires burned in Los Angeles this year, newer toxin monitors found contaminants that aren’t measured by standard methods.

UCLA's annual survey reveals growing concerns over the high cost of living and deportation fears among LA County residents.

When it comes to quality of life in Los Angeles County, a majority of people who responded to the 10th Annual UCLA/Luskin ...