A new deal cuts Nevada's water by 28 percent through 2028, but water officials say two decades of conservation have already prepared the state. Nevada just agreed to some of the biggest water cuts in its history. What's HappeningNevada, Arizona, and California have worked out a plan to cut how much water they pull from the Colorado River. Under the deal, Nevada will cut its water use by 28 percent. For years, the federal government threatened to step in and impose its own water plan on Nevada if the states couldn't agree.