California’s weather whiplash has left the Golden State in a place of severe uncertainty about its diminishing water supply and increasing human and environmental demands for water.

Numerous water-reuse plants either are inefficient or have improperly maintained facilities, meaning the country has less water to use.

The Owens River has supplied water to Los Angeles since Mullholland built the aqueduct, but a series of droughts in California underscored the need for conservation.

“The data doesn’t lie, and it is telling us that our water system is unprepared for California’s hotter and drier climate,” Newsom said in a statement.

Yorba Linda, Calif., is home to the largest water treatment plant in the country using ion exchange to remove PFAS from its water supply.

As more parts of the world face intense drought, new technologies are emerging to clean and reuse existing water. Investors are seeing potential for big profits. Water treatment is expensive. It ...

Southern California’s two largest water agencies announced Monday that they have settled a 15-year legal dispute over the price of water transferred between them.

What Happens Next Lake Oroville's water levels reaching capacity marks a historic milestone for California's second-largest reservoir. However, water levels are expected to fall throughout the summer.

The Metropolitan Water District and the San Diego County Water Authority have settled a long-running legal dispute over the rates and how much one should pay the other for delivering water.

Your water use is way up, even though Southern California is dry Column: New goals may involve shorter showers, recycled water and more conservation. Prepare!