Groundwater is also important to those who have limited precipitation each year. Water usage in itself is vital to the normal operation of our daily lives. Groundwater is the safest and most reliable source of available freshwater . Only three percent of Earth's freshwater is located in streams, lakes, and reservoirs. The remaining 97 percent of freshwater is underground.
Water is obviously a major resource of the United States.
Ninety percent of this water resource is groundwater. Groundwater can also be utilized for energy production in the form of geothermal energy as well as energy conservation by using heat pumps . In America, the amount of water usage for each person is 168 gallons per day. United States agriculture uses two-thirds of the estimated 88 billion gallons per day of groundwater withdrawals for irrigation. Rural residential use of groundwater is projected to increase by 44 percent by the year 2000.