Pioneering Water Reuse Facility Expanded

Expansion work on the 15-year-old Groundwater Replenishment System (GWRS), the world’s largest indirect potable water reuse facility has been completed. The facility can now produce 130 million gallons of water a day, enough to provide for the million people living in Orange County. The system can now recycle 100 percent of local wastewater flows ensuring drinking water access and maximising water recycling efforts of the region.

The GWRS uses a three-step advanced treatment process including microfiltration, reverse osmosis, and ultraviolet light with hydrogen peroxide to treated already treated wastewater. This water is then used to recharge basins in Anaheim to create groundwater levels in the basin and as drinking water supply for north and central Orange County.

The expansion project was untaken by the Orange County Water District (OCWD) and the Orange County Sanitation District (OC San). Find out more here.