Groundwater

• The Ogallala Aquifer stretches from Texas to South Dakota.

  • It originally contained as much water as a Great Lake and in the late 1970's provided one fifth of all the irrigation water in the US
  • Estimates indicate that this aquifer will be effectively "dry" by 2030 (less than 100 years after pumping began).

• Globally, there is a 160 billion cubic meter overdraft of groundwater per year