An annual report from the American Lung Assn. showed that Los Angeles has improved its air quality but still deserves its reputation for unhealthy air.

A hidden air pollutant is discovered by Caltech scientists that may change the way smog is studied in Southern California ...

The Los Angeles region has some of the most polluted air in the United States, failing to meet standards set by the ...

A South Coast Air Quality Management District expert offered tips on how to stay safe during summer smog season as hot weather has an adverse affect on air quality.

The iconic skyline of downtown Los Angeles ... The “State of the Air” report from the association has been handing out grades to American cities based on their air quality for the past 26 ...

Los Angeles has long struggled with air pollution, and despite progress over the decades, smog is still a major issue in the ...

There are 25 million more people living with bad air than last year's report showed, according to air quality data from the ...

California has used federal waivers to help clean up its air quality for decades. The U.S. Senate will likely revoke that ...

How Southern California Wildfires Impact Air Quality, Smoke Damage, and Insurance Coverage - The Southern California ...

At 8:26 a.m. on Friday, the NWS Phoenix AZ reported an air quality alert in effect until Sunday at noon. The alert is for ...

To the editor: Southern California has the smoggiest air in the country (“Los Angeles remains nation ... The South Coast Air Quality Management District can lead by passing rules to transition ...

They weren't. "It was just the poor quality of the air that was a hazy, acrid, smelly, burning presence," the Los Angeles Times wrote. In 1943, residents feared they were under foreign chemical ...