Ariz., Calif., Nevada face reductions in Colo. River water deliveries

Aug. 21 (UPI) — Arizona, Colorado and Nevada will see reductions in their water deliveries from the Colorado River by a combined 1.25 million acre-feet per year under a new framework finalized by federal officials on Friday.

Under the new 10-year “Decision Framework” governing the operations of the drought-afflicted Lake Mead and Lake Powell reservoirs along the Colorado River Basin, Arizona implements the largest reduction in deliveries of river water — some 760,000-acre-feet in each of the next two years.

Meanwhile, California will be hit with yearly reductions of 440,000 acre-feet and Nevada would see 50,000 acre-foot declines as state and federal officials grapple with a prolonged drought during which the two reservoirs have reached their lowest-ever recorded levels.

One acre-foot is enough water for as many as four households to use for a whole year.

The cuts represent the largest ever proposed for the three “Lower Basin” states.

The combined contents of Lake Powell and Lake Mead have not been this low since before Lake Powell began filling following the closure of the gates at Glen Canyon Dam in 1963, Interior Secretary Doug Burgum noted in announcing the new framework.

“We are grateful for the seven basin states, the thirty basin tribes, Mexico, and many other basin stakeholders who have provided the feedback and voluntary arrangements necessary for the development of the 2027-2028 operating guidelines.” he said.

“Forty million people, millions of acres of farmland and ranchland, industries that power the American West, and some of our nation’s fastest growing metropolitan areas depend on the Colorado River.”

In addition to the reduction in water deliveries, the framework allows for the three Lower Basin States to voluntarily conserve and store at least 700,000 acre-feet of water over the two-year period to protect the system.

The Colorado River Basin has been experiencing what federal officials have called an “unprecedented multidecadal drought,” resulting in historically low runoff and reservoir levels.

Conditions worsened during 2026, driven in part by the lowest observed snowpack on record during the winter of 2025-2026.