Declining water levels due to climate change and 20 years of ongoing drought have reshaped Lake Mead's shorelines as seen in this file photo from Nov. 16, 2022. The Department of the Interior on Friday published a new framework under which three Lower Basin states will face reduced water deliveries. File Photo by Jim Ruymen/UPI | License Photo

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.