Federal Plan Would Force Colorado River Cuts on Arizona, California and Nevada

The Colorado River Proposal: Mandatory Lower Basin Cuts and a Fast-Track Timetable

The U.S. Bureau of Reclamation released a proposal on Friday that would force Arizona, California and Nevada to cut their Colorado River use by up to 3 million acre-feet a year through 2036 — roughly 130 billion cubic feet, or about as much water as Arizona and Nevada receive combined. The reductions would not be fixed: the federal agency would reset them every two years based on conditions across the basin. The four Upper Basin states — Colorado, New Mexico, Utah and Wyoming — would be spared mandatory cuts for now and instead rely on voluntary reductions, mainly from agricultural users.

The proposal is the federal government’s response to a crisis that has been building for decades. A record-dry winter left Lake Mead and Lake Powell, the two largest reservoirs in the United States, at their lowest combined level since they were filled, and approaching the point where they can no longer produce hydropower. More than 40 million people in seven states, several tribal nations and Mexico depend on the 1,450-mile river, which has been over-allocated since the 1922 compact that still governs it. Adding urgency: key operating guidelines and water agreements expire at the end of 2026, and the seven states have spent years in deadlocked negotiations, including threats of lawsuits.

“The Department has a responsibility to ensure the Colorado River system remains reliable and resilient for the millions of Americans, communities and industries that depend on it,” Interior Secretary Doug Burgum said in a statement.

Initial reactions split along familiar lines. Arizona, which holds the weakest priority rights in the Lower Basin, called the plan flawed; the Central Arizona Project, which supplies much of metro Phoenix and Tucson, said it misrepresents the state’s rights. Nevada officials called the reductions unrealistic and devastating. California called it an important milestone but not the finish line. The Upper Basin governors gave the document a favorable initial assessment while saying they were still reviewing it. Federal officials are expected to finalize the proposal in the coming days.

Why the Federal Plan Puts the Cuts on Arizona, California and Nevada

Why the Lower Basin Takes the Mandatory Cuts

Under the proposal, half of the required reductions would be divided among the three Lower Basin states using a sharing plan they already developed. Beyond that, the river’s priority water-rights system takes over — a system that generally protects California users over Arizona’s. That is why Arizona, with the basin’s weakest priority status, describes the plan as devastating, while California’s reaction is comparatively measured. The federal intervention fills a gap the states left open: they could not agree on a single plan, and with guidelines expiring at the end of 2026 and reservoirs at record lows, the Bureau of Reclamation was left to act under its authority to operate the basin’s dams.

The 1922 Compact Fault Line

The dispute between the basins is legal as much as hydrological. The four Upper Basin states have repeatedly argued that mandatory cuts to their use would violate the 1922 Colorado River Compact, which apportions the river between the upper and lower basins. That argument explains why the federal proposal leaves the Upper Basin with voluntary, mainly agricultural reductions — and why the Upper Basin governors said they were “encouraged” in their initial review. Lower Basin leaders, by contrast, have pushed for all seven states to share in specific, measurable cuts. With threats of lawsuits already on the table, the final plan is likely to be tested in court after it is signed.

Fields First, Then Taps

The first material consequences will land on agriculture, the largest consumptive user in the Lower Basin. Farmers in Southern California and Yuma, Arizona, grow the majority of North America’s winter leafy greens, and experts quoted in the coverage expect unplanted fields, heavier dependence on groundwater and higher water prices. Cities are less exposed in volume terms but not in cost: metro Phoenix does not rely entirely on the river, so taps should keep running, but utilities are chasing increasingly expensive alternatives — groundwater, treated wastewater and desalination. The city of Gilbert has already raised residential rates 50% since April 2025. As water law professor Rhett Larson put it, “We are not running out of water. We’re running out of cheap water.”

The Hydropower Dimension

The plan is also, in part, an energy story. Lake Mead and Lake Powell are nearing the level at which their turbines can no longer generate power, and the two-year review cycle is designed to keep the system above that threshold. Every reduction in downstream use is, in effect, a decision about whether the basin’s dams keep producing hydropower — which is why the health of the reservoirs matters well beyond municipal taps.

What the Plan Means for Farmers, Cities and Water Bills in the Lower Basin

For water users in the Lower Basin, the proposal converts years of unresolved negotiation into a concrete, two-year cycle of cuts. Where you sit in the basin determines what to do next.

• Farmers in Yuma and Southern California — the region that grows most of North America’s winter leafy greens — should plan for the maximum scenario: combined Lower Basin cuts of up to 3 million acre-feet a year through 2036, with levels reset every two years. Decisions on fallowing fields, buying water rights and shifting crops are likely to be forced earlier than planned.
• Municipal utilities in metro Phoenix and Tucson — the Central Arizona Project, which manages much of their supply, has already said the proposal misrepresents Arizona’s rights. Rates will rise, as Gilbert’s 50% increase since April 2025 shows, and the economics push utilities toward groundwater, recycled wastewater and desalination — all costlier than river deliveries.
• Households in Arizona and Nevada — taps are likely to keep running because metro areas have diversified supplies, but budgets should anticipate higher water bills; Nevada officials’ description of the cuts as “devastating” signals how hard the state expects to be hit.
• Stakeholders in the Upper Basin — mandatory cuts are off the table for now, with voluntary, mainly agricultural reductions in play. But the 1922 compact dispute is unresolved, and the end-2026 expiry of existing guidelines means the terms of that protection could change.
• Anyone dependent on the region’s power grid — Lake Mead and Lake Powell are approaching the hydropower cutoff level, so the planned two-year determinations will effectively decide whether the basin’s dams keep generating electricity.