In order to provide a safe, reliable water supply for Orange County’s current and future residents, the Orange County Water District and Orange County Sanitation District are working to diversify Orange County’s water supply with the development of the Groundwater Replenishment (GWR) system. This innovative water purification project will provide a new source of locally controlled, high-quality water for north and central Orange County. To learn more about the GWR system, click on The website will provide interactive resources such as water purification process tours, facts and figures, construction updates and a project supporter list.