The 10 Biggest U.S. Cities That Risk Running Out of Water

Some of the nation's largest metropolitan areas are in danger of running out of water in the next decades, according to a survey of studies conducted by 24/7 Wall St.

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We consulted a range of sources, including an October 2010 report on water risk by environmental research and sustainability group CERES, a July 2010 report from the National Resources Defense Council, and our own independent analysis of water supply and consumption in America's 30 largest cities. Using these sources, we created a ranking of cities likely to face severe water shortage in the near future. Above are the ten largest cities, by population, that have a significant chance of going dry in the decades to come.