Purification process

The GWRS has a current production capacity of 130 million gallons of water per day. Approximately 30 million gallons per day (MGD) of GWRS water are pumped into injection wells in Huntington Beach and Fountain Valley to create a seawater intrusion barrier. Approximately 10 MGD are piped to our Mid-Basin injection wells in Santa Ana, and 90 MGD are pumped daily to percolation basins in Anaheim where the GWRS water naturally filters through sand and gravel to the deep aquifers of the groundwater basin to increase the local drinking water supply.

For additional information, view the GWRS technical brochure and 2024 annual report. And click the links below to explore the purification steps.