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It is part of a slightly larger aquifer system known as the High Plains Aquifer.

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The Ogallala Aquifer is a shallow water table aquifer surrounded by sand, silt, clay, and gravel located beneath the Great Plains in the United States. It is approximately 174,000 sq mi.

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The Ogallala Aquifer is being managed by converting from irrigated to dryland farming and conservation practices that improve irrigation water management, crop residue and tillage management. Nutrient and pesticide management, grazing systems and playa wetland restorations as well. The targeted area include places where great amounts of water are consumed. Focal areas will be heavily-populated municipalities in the aquifer region.

https://www.nrcs.usda.gov/wps/portal/nrcs/detailfull/national/programs/initiatives/?cid=stelprdb1048809

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The regions overlying the Ogallala Aquifer are some of the most productive regions in the United States for ranching livestock, and growing corn, wheat, and soybeans.

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Every summer the US Central Plains go dry, leading farmers to tap into groundwater to irrigate sorghum, soy, cotton, wheat, and corn, and maintain large herds of cattle and hogs

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According to a Kansas State University study, if current withdrawal rates continue, 69% of the aquifer’s water will be gone in 50 years.

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Some far-sighted farmers are responding to these interlocking challenges. Even as they pursue efficiencies in irrigation, many are shifting from water-inten crops like cotton to wheat. Still others, notably in west Texas, are converting back to non-irrigated dryland agriculture – a recognition of the stark limitations of irrigation dependency.