Kansas Geological Survey

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The High Plains Region

The High Plains aquifer is the most intensely pumped aquifer in the United States, yielding about 30 percent of the nation's groundwater used for irrigation.
In 1990, 2.2 million people were supplied by ground water from the High Plains aquifer with total public-supply withdrawals of 332 million gallons per day (USGS).
Pumping for irrigation has resulted in substantial declines in some parts of the aquifer.
More than 90 percent of the water pumped from the aquifer is used to irrigate crops.
The High Plains aquifer underlies 174,000 square miles in parts of eight states: Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming.
Irrigation withdrawals in 1990 were greater than 14 billion gallons per day (USGS).