Federal Approval of Colorado River Cuts Signals Deeper Drought Pressures on Lower Basin States

The U.S. Department of the Interior finalized 2027-2028 Operating Guidelines for the Colorado River on August 21, 2026, mandating annual reductions of 1.25 million acre-feet across Arizona, Nevada, and California. Arizona faces the largest share at 760,000 acre-feet, followed by California at 440,000 acre-feet and Nevada at 50,000 acre-feet. These cuts, signed by Secretary Doug Burgum, respond to record-low reservoir levels at Lake Powell and Lake Mead amid a 26-year drought exacerbated by the lowest snowpack on record in 2025-2026. The plan aligns with a May proposal from the Lower Basin states and provides a short-term bridge while longer-term post-2026 operations are negotiated. It encourages additional voluntary conservation of at least 700,000 acre-feet over the two years. Officials emphasize flexibility for infrastructure protection and future consensus agreements, though states have warned of economic devastation if cuts intensify beyond 2028. The guidelines cover operations through a 10-year decision framework but focus immediate mandates on the Lower Basin.