A study by UC San Diego researchers reveals that pollutants found in the sewage-laden Tijuana River are ending up in the air near the U.S.-Mexico border in San Diego County.

Many factors impact air quality in the Los Angeles metropolitan area including particulate pollution from vehicles, factories, refineries, household combustibles and wood burning. Other common ...

Emissions in 2023 were at the lowest levels at the Port of Los Angeles since 2005, the port announced on Friday. The decrease in air pollution, the port says, is in part due to increase in use of ...

Latino communities across California are disproportionately affected by extreme heat and air pollution, research has shown.

Los Angeles has struggled with air pollution problems since before smog became a term. In 1943, smog covered the city so thickly that residents thought they were under a chemical attack.

LOS ANGELES (AP) — With levels of sooty air pollution far too high across swaths of the Los Angeles area, Dana Benton is sleeping with a mask on, even with her air purifier running.

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 — Disaster is in the air. It clouds the skies, it sears the eyes, it lodges in the lungs. Most of all, it weighs on the heart. For those who have lost it all, the pain is acute. But ...

Reno and other Nevada cities ranked worse than Los Angeles for air pollution, according to the American Lung Association’s latest report. Evacuations lifted as Conner Fire burns 17,000 acres ...

LOS ANGELES — With levels of sooty air pollution far too high across swaths of the Los Angeles area, Dana Benton is sleeping with a mask on, even with her air purifier running.