Colorado River cuts could reduce hydropower and shift water across reservoirs, raising concerns for Arizona energy costs and long-term supply.

A pilot burn in California’s Delta explores how cultural fire practices may increase carbon storage, restore wetlands, and reduce land subsidence.

Lake Powell edges toward a critical level as snowpack drops, runoff peaks early, and tensions rise across the Colorado River Basin. This week's video explores these and other issues.

Arizona court invalidates groundwater rules that halted Phoenix-area housing, citing failure to follow legal rulemaking procedures.

A new study finds many California groundwater targets may be missed by 2040, even with major cuts in water use across the Central Valley.

A proposal to federalize the Potter Valley Project raises concerns about exporting Eel River water and reshaping Northern California supply.