Colorado River: cuts follow record-low reservoirs

In late August 2026 the U.S. announced reduced deliveries from the Colorado River to Arizona, California and Nevada after Lakes Powell and Mead fell to record lows.

What changed

Powell and Mead — the two largest U.S. reservoirs — reached their lowest recorded combined storage in mid-August. Reporting put Mead near about 27% full and Powell near about 22–23%. On 21 August, federal officials accepted a short-term cutback plan for the three lower-basin states. Arizona faces the steepest percentage reduction; California and Nevada also take less than their recent use.

Related: Powell and Mead record lows.

Why it matters

The Colorado supplies tens of millions of people and large irrigation areas. With almost no reservoir buffer left, a dry winter would tighten cities, farms, and hydropower at Glen Canyon and Hoover. Cuts shift pressure onto groundwater in the short term — the same pattern many regions use when surface water fails.

Educational news brief based on public reporting in August 2026. Allocations can be revised. About.