A California court ruled that fire debris runoff polluted the Dominguez Channel in 2021, triggering weeks of toxic odors and millions in penalties.

Late December storms brought uneven drought relief across the Colorado River Basin, improving conditions in some areas while others grew drier.

Late December storms lifted California’s snowpack to 71 percent of average, improving water supply outlooks while leaving the season’s final outcome uncertain.

Federal officials completed a Utah land exchange involving water planning, conservation lands, and Mojave desert tortoise habitat in Washington County.

President Trump vetoed a bipartisan bill affecting repayment terms for the Arkansas Valley Conduit, a long-delayed rural drinking water project in Colorado.