Parts of three states face potentially unhealthy levels of air pollution early Wednesday, a live map from AirNow shows.

The agreement comes after nearly a decade of negotiations between air quality officials and the nation’s largest ports.

Southern California air officials voted overwhelmingly Friday to give themselves the power to levy fines on the ports of Los ...

A new agreement with the region’s air-quality watchdog commits the Long Beach and LA ports to developing and implementing ...

The quality of air you breathe has a direct impact on your overall quality of life. Unfortunately, these cities have the worst air quality in the United States.

On Monday at 12:55 p.m. an air quality alert was reported by the NWS San Diego CA in effect until Wednesday at midnight. The ...

Transportation, agriculture, energy production, geography — all these factors drive Bakersfield's air pollution. What does it ...

California regulators are reconsidering the state’s 2035 deadline for phasing out new gas car sales, the state’s top air ...

Saturday: Brilliant sunshine and nice, with a high of 78 and low of 56 degrees.

California air regulators have opened a public comment period on a plan by Marathon Petroleum to modernize parts of its 384,500 b/d Los Angeles refinery complex, the largest refinery on the West Coast ...

While Donald Trump skips the world stage, California is showing up — leading, partnering, and proving what American climate ...