Colorado River water cuts will require California, Arizona and Nevada to reduce their combined water use by 1.25 million acre-feet per year in 2027 and 2028, under a short-term plan finalized by the U.S. Interior Department. The reduction largely follows a proposal developed by the three Lower Basin states themselves, giving communities and water managers some near-term certainty as the seven states dependent on the river struggle to agree on a longer-term system for managing a shrinking water supply.

The federal plan also encourages the three states to conserve and store an additional 700,000 acre-feet collectively over the next two years. The measures come as the Colorado River faces prolonged drought and increasingly difficult water conditions across the American West.

A Short-Term Deal After Years of Negotiations

The Colorado River supplies drinking water as well as water for agricultural, industrial and municipal uses across Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming.

The seven states have spent years negotiating how the river should be managed after the existing 2007 interim guidelines expire at the end of 2026. Those negotiations have failed to produce a comprehensive agreement, leaving the federal government to establish interim requirements.

Cuts Are Less Severe Than the Larger Federal Proposal

The immediate reductions are significantly smaller than the figure included in the federal government’s recently announced 10-year framework.

That framework indicated that Lower Basin states could eventually face cuts of as much as 3 million acre-feet annually, depending on future water conditions. Arizona and Nevada officials had warned that reductions of that scale could cause serious economic damage.

Interior officials have emphasized that the 10-year framework is designed to respond to changing reservoir and river conditions. The maximum cuts therefore may never be imposed.

For 2027 and 2028, however, the federal government is opting for the lower figure proposed by California, Arizona and Nevada.

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States Welcome Near-Term Certainty

• Arizona Department of Water Resources Director Tom Buschatzke described the two-year reductions as providing substantial stability while negotiations continue.
• California’s chief Colorado River negotiator, JB Hamby, similarly described the agreement as a temporary bridge rather than a permanent answer to the river’s problems.
• Nevada officials have also welcomed cooperation between the three Lower Basin states, although they continue to favor a broader agreement involving all seven states.

The immediate challenge is creating a system that can work beyond 2028 as the West becomes drier and demand continues to place pressure on the river.

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Water Cuts Could Affect Growth

The consequences extend beyond agriculture and household water supplies. In Southern Nevada, conservation advocates have pointed to the potential effect of declining water availability on development around Las Vegas.

Kyle Roerink of the Great Basin Water Network said the difficult hydrological conditions are already reflected in stalled projects, including some proposed development and public-land sales.

For now, the new Colorado River water cuts provide two years of defined reductions rather than the potentially much larger cuts contemplated under the longer-term framework. But with the river remaining under severe pressure, water managers still face the harder task of deciding how seven states will share its resources after 2028.

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