It's likely a combination of these factors that helped create such a high level of pollution over much of Southern California, especially when one considers the daily bumper-to-bumper traffic all ...

New report ranks six of nation's ten cities with worst air pollution in Southern California 03:02. A new report shows that some of the nation's most polluted cities are in Southern California ...

A regional air quality alert was issued for much of Southern California as harmful levels of fine particle pollution spread across the region following Fourth of July fireworks and active ...

Hazardous air quality is shown in a June 11, 2025, map from the South Coast AQMD. The AQMD hasn’t pointed to a specific cause, though a few wildfires in Southern California have likely had an ...

According to the ranking in IQAir's 2024 World Air Quality Report, these are the 10 U.S. cities with the worst pollution in North America: Ontario, California (14.3 μg/m³) Bloomington ...

Air quality regulators in Southern California voted 7 to 5 to reject rules that would have curbed harmful emissions from gas-powered furnaces and water heaters.

The district regulates air quality for 16.8 million people in Southern California, including all of Orange County and large areas of Los Angeles, Riverside and San Bernardino counties — one of ...

Residents in Southern California may notice low-flying NASA aircraft later this month as part of a mission to study air pollution and greenhouse gas emissions, the agency announced Friday.. From ...

SANTA BARBARA COUNTY, Calif. – The Santa Barbara County Air Pollution Control District announced an upgraded version of its Permitted Facilities Map, an interactive online tool of the county's ...

Southern California air regulators weigh a plan to phase out gas furnaces and water heaters Jun 6, 2025, 1:07 PM FILE - A person with a dog walks along a trail as a layer of smog blankets downtown ...