The Ogallala Aquifer, also known as the High Plains Aquifer, is a vast yet shallow underground water table. It's located beneath the great plains. It covers an area of approximately 174,000 mi² (450,000 km²) in portions of eight states. About 27 percent of the irrigated land in the United States overlies this aquifer system, which yields about 30 percent of the nation's ground water used for irrigation. In addition, the aquifer system provides drinking water to 82 percent of the people who live within the aquifer boundary. The USGS estimated that total water storage was about 2,925 million acre feet in 2005. This aquifer is diminishing from overuse and we need to use its water rationally.
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