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The U.S. Environmental Protection Agency has ordered the Los Angeles Department of Water and Power inspect nearly 100 drinking water reservoirs and storage tanks due to concerns over improper maintenance.

A landmark deal with Pacific Gas & Electric will extend the life of the state's remaining nuclear power plant in exchange for thousands of acres of new conservation in San Luis Obispo County.

The lawsuit filed Wednesday in Los Angeles Superior Court charges four oil companies with failing to properly clean up at least 227 idle or exhausted wells in the oil field near Baldwin Hills.

The California Department of Fish and Wildlife is recommending listing mountain lions in Southern California and the Central Coast as threatened.

A new study found that in the Eaton and Palisades fires, homes that had already adopted proposed regulations on creating vegetation-free buffers were less likely to burn.

California wildlife officials are now allowing mountain lions to be killed to protect endangered bighorn sheep, changing a nearly decade-long practice of just moving them.

Scouts recently returned to Camp Josepho for the first time since the fire. They came to clear overgrowth, clear mudflows and help restore the land.

The challenge to President Trump's wind ban was brought by attorneys general in 17 states, including California, and Washington.

More buildings are going all-electric, especially in states trying to address climate change. UCI Health-Irvine, the largest all-electric hospital in the country, is opening Wednesday.

Private cleanup crews were dispatched to the scene at the San Ardo Oil Field, which was 'contained to the immediate area,' according to reports from field operator Aera Energy.