The U.S. Department of the Interior released a two-year operating plan on Friday requiring Arizona, California, and Nevada to reduce the amount of water they draw from the Colorado River. The new guidelines, which run through 2028, are intended to address falling water levels in Lake Mead and Lake Powell, the river's two primary reservoirs.
The decision follows years of unsuccessful negotiations between the seven states that rely on the river for water and electricity. According to the Bureau of Reclamation, which manages water resources in the Western U.S., the river has been impacted by a multi-decade drought and rising temperatures. In July 2026, the bureau established a 10-year framework requiring water-sharing adjustments every two years, leading to the specific mandates issued this week.
Under the new plan, Arizona will face a reduction of 760,000 acre-feet, which Sarah Porter of the Kyl Center for Water Policy estimated at 27% of its draw. Nevada will reduce its intake by 50,000 acre-feet (16%), and California will see a reduction of 440,000 acre-feet (10%). No mandatory cuts were assigned to the four upper basin states: Colorado, Utah, Wyoming, and New Mexico. Arizona officials expressed support for the plan, while representatives from Nevada and California criticized the lack of shared reductions from the upper basin states.
In the day-to-day, residents in these states may notice changes in local water management, though specific impacts on utility bills or household restrictions will depend on how state and local agencies implement the cuts. California's Metropolitan Water District indicated that urban and agricultural users will need to negotiate internal plans to meet the 440,000 acre-foot reduction. Farmers in the region, who rely on the river to irrigate crops like alfalfa, face immediate uncertainty regarding their planting schedules and water allotments for the coming two-year cycle.
The plan sets a precedent for federal intervention when states cannot reach a consensus on water sharing. While this interim plan is in effect, the risk of litigation remains high; officials from Nevada and Arizona have previously indicated they may take legal action if they feel their supplies are unfairly targeted. The next major milestone occurs in 2028, when the Bureau of Reclamation will reassess reservoir levels and potentially issue new mandates. Until then, the seven basin states may continue negotiating to reach a voluntary agreement that could supersede these federal requirements.