Trump Plan Threatens 77% Arizona Water Cut as Colorado River Rules Expire
Updated
Updated · Arizona Mirror · Aug 1
Trump Plan Threatens 77% Arizona Water Cut as Colorado River Rules Expire
3 articles · Updated · Arizona Mirror · Aug 1
Summary
Arizona could lose more than three-quarters of its Colorado River supply under the Trump administration’s preferred alternative, part of a federal plan for 2027-2028 that would cut Lower Basin use by 3 million acre-feet a year.
The proposal comes as a 25-year megadrought and climate-driven declines push Lake Powell and Lake Mead toward crisis, with current operating rules expiring at year-end and seven-state negotiations still deadlocked after more than two years.
Arizona officials say the burden is disproportionate because the Central Arizona Project holds junior water rights, making it among the first supplies cut, even as the state argues Upper Basin states should also face mandatory reductions.
Lower Basin states had offered a milder May plan to save 1.25 million acre-feet annually, including roughly a 30% Arizona cut, and Gov. Katie Hobbs urged Washington to adopt that framework instead of what she called draconian reductions.
The river supplies 40 million people, Mexico and 30 tribes, and Arizona has already hired Sullivan & Cromwell for possible litigation, though some water lawyers say the immediate fight is still political rather than in court.
If reservoir levels continue plummeting after 2028, what drastic sacrifices will Southwestern cities be forced to make to survive?
Could a radical grand bargain finally force the Upper and Lower Basins to share the burden before reservoirs empty completely?
With Nevada facing massive water cuts, will decades of aggressive conservation be enough to save Las Vegas from running dry?
The 2026 Colorado River Crisis: Federal Mandate Imposes 21% Water Cuts Amid Drought, Grid Threats, and Legal Battles
Overview
In July 2026, the U.S. Bureau of Reclamation imposed immediate, major water cuts on Arizona, California, and Nevada after the seven basin states failed to agree on new Colorado River management as the 2007 guidelines neared expiration. This action was driven by the historic depletion of Lake Mead and Lake Powell, caused by decades of overallocation and a 27-year drought worsened by climate change. The cuts—up to 31% for Arizona—will deeply affect cities, tribes, and power generation, as dropping reservoir levels threaten hydroelectric output. Nevada’s advanced conservation and new interstate water deals highlight how states are adapting to this escalating crisis.