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By Joe Edwards
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New data suggest that a disappointing snowpack could result in less water than previously thought for America's two largest reservoirs.
Why It Matters
Lake Mead is a vital water source for millions of people across Nevada, Arizona, California, and parts of Mexico. Its declining levels potentially jeopardize municipal water supplies, agricultural irrigation, and hydroelectric power generation.
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What To Know
Officials previously raised concerns about the water levels in Lake Mead and Lake Powell, following a lacking winter snowpack that threatened to stall progress made during last year's wetter-than-average season.
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The resulting water supply is expected to be even lower than earlier projections. Scientists now forecast runoff into Lake Powell to reach just 55 percent of the average, down from the previous estimate of 67 percent, according to data from the National Weather Service's Colorado Basin River Forecast Center cited by the Las Vegas Review-Journal.
Lake Powell, situated along the Arizona-Utah border, and Lake Mead, located near Las Vegas, are both integral components of the Colorado River system. The Colorado River Basin supplies water to more than 40 million people across seven states and Mexico.
Lake Mead, which receives flows from Lake Powell, hit critically low levels during the summer of 2022 following years of drought.
The lakes are the two largest reservoirs in the U.S., with a combined capacity of approximately 55 million acre-feet.
At the time of writing, Lake Mead's water levels were 1,060.06 feet mean sea level, 168.94 feet below its full pool of 1,229, according to Lakes Online, an online resource for lake and reservoir information.
What People Are Saying
Kyle Roerink, executive director of the Great Basin Water Network, told the Las Vegas Review-Journal: "It's going to be a painful summer, watching the levels go down. We're getting to those dangerous levels we saw a few years ago."
"These types of runoff conditions make water managers nervous," Roerink said. "They make NGOs nervous, and they certainly make water users nervous."
What Happens Next
Meanwhile, the states that rely on the Colorado River have been engaged in negotiations to develop new water-sharing agreements by 2026.
A study earlier this year suggested that increasing wastewater recycling to 40 percent in states within the basin could conserve nearly 900,000 acre-feet of Colorado River water annually, enough to supply almost two million households. The authors advocate for policy actions such as new federal reuse guidelines, standardized reporting, and expanded grant programs to promote water recycling.
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