US proposes historic Colorado River cuts for Southwest states amid record shortage

The Colorado River is running dry, and the federal government has finally said out loud what the West has been avoiding for years: there is not enough water to go around. On Friday, the US Bureau of Reclamation released a proposal that would force Arizona, California, and Nevada to cut their water use by up to 3 million acre-feet annually through 2036—enough to supply drinking water to more than 25 million people. The three Lower Basin states would shoulder the burden while four Upper Basin states escape mandatory reductions for now. It is a historic intervention, born of desperation, and it signals that the river's collapse is no longer theoretical.

The Colorado River has been dying for decades. More than 40 million people across seven states, Mexico, and numerous tribal nations depend on its flow. But the river was over-promised in 1922, when water managers drew up allocation agreements based on a wet cycle that has not returned. Rising temperatures, a decades-long drought, and climate change have drained the system faster than anyone anticipated. The two largest reservoirs in the country—Lake Mead and Lake Powell—are now at their lowest combined level since they began filling, a crisis made visible by satellite images showing ghostly white bathtub rings where water once was. The snowpack that feeds the river hit a record low, and the reservoirs have fallen to levels not seen since 1957. At current trajectories, they are approaching the point where they can no longer generate hydropower, a collapse that would ripple across the entire region.

The proposal itself is a compromise born from failure. For years, the seven states negotiated among themselves, each protecting its own interests, each threatening lawsuits if the outcome seemed unfair. The Upper Basin states—Colorado, New Mexico, Utah, and Wyoming—resisted mandatory cuts, arguing that such reductions would violate longstanding water law and that they should not be forced to sacrifice what the river has historically provided. The Lower Basin states wanted everyone to share the pain. No agreement came. The deadline approached. So the federal government stepped in with its own plan, one designed to be flexible enough to survive legal challenge while forcing the three states with the most to lose to accept the deepest cuts.

The mechanics are straightforward but brutal. Arizona, California, and Nevada will divide half the required reductions based on a plan they had already developed. Beyond that, priority water rights determine who loses more. Arizona, which holds the lowest priority claim in the Lower Basin, faces the steepest cuts. The actual reductions will be recalibrated every two years based on basin conditions, allowing for deeper cuts in drier years and some relief in wetter ones. The Upper Basin states can pursue voluntary cuts, mostly among agricultural users, but face no federal mandate. Interior Secretary Doug Burgum framed the proposal as necessary to keep the system reliable for millions of Americans and the industries that depend on it. The federal government released its final environmental review on Friday, with binding operating guidelines expected by October 1.

The reactions from the states reveal the depth of the wound. Arizona's water officials called the proposal flawed and said that 3 million acre-feet of cuts would devastate water users and the state's economy. Nevada's governor called the reductions unrealistic and devastating. California acknowledged the proposal as an important milestone but not a solution. The Upper Basin governors offered cautious support, saying they were encouraged that new guidelines would reflect actual water supply rather than historical fantasy. But beneath the diplomatic language lay a fundamental disagreement about who should sacrifice and how much.

The human cost will be substantial and unequally distributed. Farmers in Southern California and Yuma, Arizona, produce the majority of North America's winter leafy greens. Those fields will shrink. Agricultural water, the cheapest and most abundant use of the river, will be rationed first. Cities in metro Phoenix do not rely entirely on Colorado River water and will likely keep taps running, but water rates will climb. The city of Gilbert has already raised residential rates by 50 percent since April 2025. Across the basin, municipalities are scrambling to find alternative sources—groundwater, treated wastewater, desalinated water—all far more expensive than Colorado River deliveries. As one water law professor at Arizona State University put it, the region is not running out of water; it is running out of cheap water. The proposal forces a reckoning that has been delayed for a century, and the bill will come due in higher prices, smaller harvests, and a landscape reshaped by scarcity.