Groundwater Storage

The recently approved Central and West Coast Groundwater Basin judgments regarding groundwater storage will be a major water supply sustainability component to the region's future. The storage agreement between WRD and local groundwater pumpers will provide the capacity for as much as 450,000 acre-feet (nearly 147 billion gallons) to be available to store water for future use, greatly reducing our regions’ demand for imported water.

In a highly urbanized region like WRD’s service area, the ability to build surface storage is limited. Moreover, the potential costs to build such facilities would likely soar into the billions of dollars. Storing water in the available space within aquifers is cost effective and proven. Groundwater storage also means that the groundwater is protected from evaporation and natural disaster. Most importantly, groundwater storage allows the region to save additional water collected during rainy years and use it during dry years.