Six Major US Reservoirs Hit Lowest May Levels in 30 Years
Six Major US Reservoirs Hit Lowest May Levels in 30 Years
US · Published May 28, 2026
Six major reservoirs across the United States have reached their lowest May levels in at least three decades, according to federal data from the Bureau of Reclamation.
These reservoirs include Lake Mead and Lake Powell in the Colorado River Basin, which are critical for water supply and hydropower generation.
Lake Mead is currently at 49.2% of its typical level for this time of year, while Lake Powell is at just 38.5%.

Why It's Important?

The declining reservoir levels pose significant risks to water availability, agriculture, and energy production. In the Colorado River Basin, millions of people depend on Lake Mead and Lake Powell for drinking water and irrigation, while their hydropower facilities supply electricity to the Southwest. Lower water levels could lead to reduced water deliveries, higher energy costs, and challenges for agricultural operations. The situation is particularly concerning as summer demand for water and energy is expected to rise, further straining already depleted resources.

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