Overview
- Federal officials finalized mandatory cuts that require Arizona, California and Nevada to reduce deliveries by about 1.25 million acre-feet for 2027–2028, with Mexico taking a 250,000 acre-foot treaty reduction.
- Interior Secretary Doug Burgum signed the 2027–2028 operating guidelines on August 21, 2026, which install the two-year cuts and create a reservoir-triggered, adaptive framework for the next decade.
- Lake Powell and Lake Mead sit at record-low levels after a very dry snow season and a multi-decade drying trend, reducing runoff and forcing lower releases that also cut hydropower output at Glen Canyon and Hoover dams.
- The reductions concentrate near-term burdens on farms, cities, tribes and utilities in the Lower Basin and are already prompting groundwater pumping, reuse plans, payments to farmers and emergency energy planning.
- Analysts warn the measures raise legal and political conflicts between states and could force larger future cuts if reservoirs fall further, while defense and grid experts flag rising risks to military bases and electric reliability.