Ogallala aquifer

Location map showing the boundary of the High Plains (Ogallala) aquifer, major cities and roads, and altitude of land surface.

The Ogallala aquifer is one of the largest known aquifers (also known as the High Plains Aquifer) The Ogallala is an ancient, non-replenishing body of water that supplies nearly one third of the water used for irrigation in the United States. The aquifer lies beneath 8 states in the U.S. and occupies some 175,000 square miles. More than 5 trillion gallons of water are pumped from the aquifer each year.[1] These large underground aquifers may represent remnants of the subterranean waters that burst forth during the global flood.