While lakes often provide important drinking water supplies, most water is underground in aquifers. However, about 20% of aquifers around the world are being overexploited, as water is being drawn from them than faster than it can recharge naturally. Globally, society is using about 3.5 times more water than aquifers can support, with areas in North America and Asia most at risk of aquifers running dry over the next several decades. In the U.S. areas in the Central Valley in California and parts of the high plains in the Texas Panhandle and western Kansas are most at risk of running out of aquifers dry.
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