Gas-powered cars and diesel trucks remain the state’s largest sources of smog and soot despite decades of cutting emissions.

Los Angeles and much of Southern California were met with a regional air quality alert on Saturday, following July 4th ...

California air quality regulators are failing to address landfill pollution, putting communities at risk of toxic exposure and health issues.

In Southern California, large warehouses must take steps to reduce the pollution caused by truck visits, either by switching ...

A regional air quality alert was issued for much of Southern California as harmful levels of fine particle pollution spread ...

The mini-heat wave is expected to last long with temperatures set to cool down by the weekend. However, NWS forecasters said the heat may linger in the interior valleys. "I think you’ll start to ...

A regional air quality alert has been issued for parts of Southern California as two fires continue to burn in Riverside ...

On Wednesday at 2:12 p.m. an air quality alert was reported by the NWS San Diego CA in effect until Sunday at midnight. The ...

The Madre Fire, now the largest wildfire in California this year, expanded to 79,630 acres by Saturday, July 5, prompting ...

As San Luis County's Madre Fire rips through California, air quality warnings are now being issued for nearby areas, ...

An air quality alert was reported by the NWS San Diego CA on Thursday at 2:47 p.m. in effect until Saturday at midnight. The ...

A fleet of air quality monitoring vehicles took to the streets of California yesterday, marking the start of a year long ...