Los Angeles County is the focus of an air quality alert reported at 1:58 p.m. on Wednesday by the National Weather Service.

For most of Monday, measurements on the U.S. Air Quality Index hovered around moderate or good in the central Los Angeles area, but only through 9 p.m. Starting then — just after most firework ...

On Wednesday morning, air quality all around Los Angeles reached "hazardous," the worst possible rating for air quality. It means just about everyone could experience problems from breathing the air.

But air quality can vary on a hyperlocal scale, meaning the network of official sites is "fairly sparse," says Michael Jerrett, an air pollution expert at the University of California, Los Angeles.

Los Angeles gets ‘F’ grade for air quality once again in national report Greater Los Angeles remains the smoggiest metropolitan area in the nation, according to a Lung Assn. report card.

The hazardous air quality in Los Angeles is largely a result of smoke from the Pacific Palisades fire, intensified by strong Santa Ana winds. The winds, with gusts reaching up to 100 mph, ...

With the state of California under a stay-at-home order for the last several weeks because of the threat of coronavirus, Los Angeles’ notoriously dirty air has dramatically improved.

Is air quality bad outside enough to wear a mask in Los Angeles? An expert explains 02:07. After several wildfires combined to torch tens of thousands of acres of vegetation in Los Angeles County ...

At 1:58 p.m. on Wednesday, the NWS Los Angeles/Oxnard CA reported an air quality alert in effect until Saturday at 11 p.m.