ACWA Member Efforts Jun 1, 2017 Delivering Safe Drinking Water Here are some examples of innovative projects and critical investments by ACWA members to ensure clean, safe drinking water: San Diego’s Water Purification Demonstration Project The City of San Diego launched its Water Purification Demonstration Project (PDF) to determine whether advanced water purification technology could provide a local and safe drinking water supply for San Diego, and evaluate the feasibility of a full-scale reservoir augmentation project, where purified water could be blended with imported water supplies in the San Vicente Reservoir before going to a standard drinking water treatment plant. The project’s operational testing and monitoring verified the water purification process consistently produces water that meets all state and federal drinking water standards. The purified water is similar in quality to distilled water. Orange County Water District’s Groundwater Replenishment System The Groundwater Replenishment System, a cutting-edge program jointly developed by Orange County Water District (OCWD) and Orange County Sanitation District (OCSD), is the largest water purification project of its kind in the world. The system takes highly treated wastewater that would have previously been discharged into the Pacific Ocean and purifies it using a three-step advanced treatment process consisting of microfiltration, reverse osmosis and ultraviolet light with hydrogen peroxide. The process produces high-quality water that exceeds all state and federal drinking water standards. The facility can produce up to 70 million gallons (265,000 cubic meters) of high-quality water every day. This is enough water to meet the needs of nearly 600,000 residents in north and central Orange County, California. Coachella Valley Water District’s Chromium-6 Water Treatment Pilot Study Coachella Valley Water District is actively engaged in research and development related to chromium-6 water treatment. The district is currently evaluating the results of a bench scale test performed at CVWD’s water quality laboratory in October 2016, which indicated that a new Reduction-Coagulation-Filtration (RCF) process would be effective on water samples from CVWD wells. The treatment process has the potential to be a simpler alternative to previous plans to construct ion exchange and blending water treatment facilities and would be more environmentally friendly, more cost-effective and have less impact on the community. More information will be shared on the district’s website as it becomes available. West Valley Water District’s Groundwater Wellhead Treatment System West Valley Water District’s treatment system uses an anoxic process to transform the perchlorate in groundwater into harmless byproducts. Contaminated water from two of West Valley’s groundwater wells is treated at the facility, producing potable water that meets all regulatory requirements and serves more than 16,000 customers daily. Want to add your ACWA member agency’s project to this list? Please contact Emily Allshouse at (916) 441-4545.