Summary
In 2025, Lake Mead's water levels, part of the Colorado River Basin, showed a decline according to official data. This reservoir is important for supplying water and hydroelectric power to several western U.S. states, and its decreasing levels have sparked discussions about new management rules.
Key Facts
- Lake Mead is the largest reservoir in the U.S., located in the Colorado River Basin.
- It provides water and hydroelectric power to millions in Nevada, Arizona, California, and parts of Mexico.
- Lake Mead's water level was 1,066.37 feet at the Hoover Dam in January 2025 and gradually decreased over the year.
- By December 21, the reservoir was 33% full, holding about 53% of its typical storage for this time of year.
- Discussions are ongoing to establish new guidelines for Lake Mead and Lake Powell as the current rules expire in 2026.
- The existing 2007 Operating Guidelines determine water releases from Lake Mead and Lake Powell.
- Experts note that the current water storage situation is poor, and snow conditions in early 2026 are not promising.
- The Colorado River system is under stress, affecting water deliveries and dam operations, including hydropower.
