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Ogallala Aquifer Quick Facts

Ogallala (Updated Logo)
  • Major aquifer that underlies the entire HPWD service area.
  • Deposition of the Ogallala Formation began 10-12 million years ago
  • Soil types include sand, gravel, silt, and clay
  • One of the largest aquifers in the world (approximately 174,000 square miles)
  • Stretches across portions of eight states (South Dakota, Nebraska, Wyoming, Colorado, Kansas, Oklahoma, New Mexico, and Texas)
  • Water flows from northwest to southeast at about 150 feet per year under natural conditions
Ogallala Aquifer Fact SheetOgallala Base ElevationOgallala Saturated Thickness
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