The federal government has released a plan to manage the drought-stricken Colorado River that will require Arizona, California, and Nevada to reduce their water use by a combined 20 percent over the next two years, according to officials familiar with the negotiations.
Federal Plan Mandates Strictest Colorado River Cuts to Date
The plan, which includes a final environmental impact statement released Friday, July 31, 2026, marks a federal intervention after seven western states failed to agree on how to update 20-year operating guidelines that expire at the end of this year. Interior Secretary Doug Burgum stated that the Department has a responsibility to ensure the river system remains reliable for the millions of Americans, industries, and communities that depend on it.
The new framework replaces 2007 guidelines and establishes a management system that will be revisited every two years through 2036. While the initial phase mirrors proposals submitted by the Lower Basin states earlier this year, the broader 10-year framework allows for more severe reductions. Under the plan, water deliveries to the Lower Basin could eventually be reduced by up to 40%, with potential shortages of up to 3 million acre-feet per year.
Impacts on Lower and Upper Basin States
The burden of the reductions falls primarily on the Lower Basin states. Arizona, California, and Nevada will collectively implement 1.5 million acre-feet of reductions annually for the first two years.
Specific impacts include:
- Nevada: The state’s annual share of 300,000 acre-feet will be slashed by a sixth, a reduction of 50,000 acre-feet per year. This aligns with Nevada’s own earlier proposal and follows a year where total community-wide use was 198,000 acre-feet, according to the Southern Nevada Water Authority.
- Arizona: The Arizona Department of Water Resources labeled the Bureau of Reclamation proposal “unacceptable,” warning that such cuts could devastate the state and potentially cut off Central Arizona Project deliveries to Tucson and Phoenix.
- Upper Basin: The states of Colorado, New Mexico, Utah, and Wyoming are not subject to mandatory cuts; they will contribute 200,000 acre-feet collectively on a voluntary basis as conditions allow.
Environmental Crisis and Infrastructure Risks
The federal intervention comes as the U.S. West faces its worst drought in at least 1,200 years, according to a 2022 University of California, Los Angeles study. Scientists attribute a 20% decline in river flow since 2000 to human-caused climate change and rising regional temperatures.
Current conditions have reached a critical point:
- Reservoir Levels: Major reservoirs have hit record lows, with water levels at Lake Powell dropping under 24%.
- Water Inflow: Following an unusually hot spring and poor snowfall, river inflows have fallen to less than a quarter of average annual demand.
- Economic Stakes: The river supports an estimated $1.4 trillion in GDP and 16 million jobs, providing water to one in 10 Americans and irrigating land that produces 15% of U.S. food output.
Experts warn that one or two more dry years could severely disrupt drinking water supplies, irrigation for roughly 5 million acres of farmland, and hydropower generation for 6 million people.
Legal Uncertainty and Next Steps
Despite the release of the environmental impact statement, some uncertainty remains until a formal Record of Decision is released. JB Hamby, the lead negotiator for California, noted that the next step is the release of a specific operating plan for 2027 and 2028, describing the current milestone as not the finish line.
The transition to federal mandates may trigger a yearslong legal struggle. State officials and experts have warned that the intervention could lead to lawsuits and fights at the U.S. Supreme Court over water allocations. Negotiators have argued that the Interior Department provided insufficient financial support and leadership, while federal officials criticized the states for their inability to compromise.
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