The Southwest, Great Plains, and Southeast are particularly vulnerable to changes in water supply and demand. Changes in precipitation and runoff, combined with changes in consumption and withdrawal, have reduced surface and groundwater supplies in many areas. These trends are expected to continue, increasing the likelihood of water shortages for many uses.
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Over 68 percent of Earth's freshwater is locked up in ice and glaciers; and another 30 percent is in groundwater.
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Snow is very good for the groundwater levels.
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With groundwater levels dropping due to overuse, drought and climate change, the challenge to get enough water daily was becoming harder.
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