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How much water is used by people in the United States?

Since 1950, the USGS has collected and analyzed water-use data for the United States and its Territories. That data is revised every 5 years.

As of 2015, the United States uses 322 billion gallons of water per day (Bgal/day). The three largest water-use categories were irrigation (118 Bgal/day), thermoelectric power (133 Bgal/day), and public supply (39 Bgal/day), cumulatively accounting for 90 percent of the national total.

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