An "unprecedented" toxic algae bloom has overrun the coast of Southern California, sickening marine animals and staining the ...

The LA area is once again the worst for ozone in the U.S., a pollutant impacting millions more people nationwide, the ...

Visalia is once again the worst for ozone in the U.S., a pollutant impacting millions more people nationwide, the American ...

Almost half of everyone who lives in the United States breathes unhealthy levels of air pollution, according to the American ...

American Rivers ranks the Tijuana River No. 2 on its list of most endangered rivers. Advocates are urging the U.S. and Mexico ...

California fights America's worst smog with the country's toughest environmental regulations. But is the Golden State really ...

Fresno ranked third among the worst U.S. cities for air pollution, according to the American Lung Association’s annual State ...

The study released Wednesday also documented the region’s inordinate short-term and year-round particle pollution. The annual ...

California cities nearly covered all five spots in the Top 5 Most Polluted Cities when it comes to year-round particle ...

The cities most polluted with smog, according to the report, are all in California, including the Los Angeles-Long Beach area, Visalia and Bakersfield-Delano. The annual report also highlights ...