January 7, 2017, 9am PST
Seven oil companies, including Chevron, have been injecting wastewater into 10 aquifers for decades despite never receiving permission from the U.S. Environmental Protection Agency to do so. The aquifers are not currently used for drinking water.
November 6, 2016, 11am PST
While billed as an "anti-fracking initiative," Measure Z in Monterey County, the 4th-largest oil-producing county in California, does far more. It bans new oil drilling and requires the cleaning of wastewater from current drilling operations.
February 12, 2016, 9am PST
It's a temporary cap, but it means that thousands of Porter Ranch, Los Angeles residents can return home. SoCalGas has begun the process of permanently capping the leak of the huge natural gas storage field first detected on Oct. 23.
February 8, 2016, 6am PST
Disposal of wastewater from fracking has long been associated with earthquakes in Oklahoma as well as Ohio and Texas. A new study shows they were likely the cause of a swarm of quakes in 2005 in the capital of oil in California, Kern County.
December 16, 2015, 2pm PST
The mother of all natural gas leaks can be found near Porter Ranch in Los Angeles County. The methane, a potent greenhouse gas, is leaking from an underground storage facility known as the Aliso Canyon Gas Storage Field owned by SoCalGas Company.