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process to ensure that an anomaly at any given treatment step would not Reverse purifies for Future Supply compromise . Here is a look at the process: the water to a level similar to The Advanced Facility is the focal point of the City of quality. This process is San Diego’s Water Purification Demonstration Project (Demonstration – used by the industry. Project). This project is vital to San Diego’s future and is a critical step Barrier 1 1 2 3 towards developing a local, sustainable and reliable . This The first step in the water purification state-of-the-art facility, located at the North City Water Reclamation process is membrane filtration. Two types of membrane filtration systems are being Plant, is using the most advanced technologies to purify one million tested — and — gallons of recycled water per day. to determine which is most effective. This treatment step uses a series of membrane filtration canisters that remove contaminants Disinfection/Advanced Oxidation – 2 in the already-treated Barrier 3 Barrier 1 recycled water. Water Step three of the purification process is advanced oxidation through Storage Inside the membrane the use of ultraviolet (UV) light and peroxide. Inside the filtration canisters are vessel shown to the right is a hollow fibers that block high intensity light, similar to 1 3 extremely concentrated sunlight, 1 unwanted materials Ultraviolet like , that provides disinfection. Light/ and from passing through. The filters are extremely Hydrogen peroxide Advanced is added and reacts Oxidation efficient and are tested daily to confirm their consistent removal of contaminants. After undergoing membrane filtration, the clouded with the light to form Ultrafiltration powerfully1 reactive2 3 Microfiltration appearance of the recycled water is converted into a clear solution that contains dissolved organic material and salts. molecules like those used by to clear pollutants from Enter Exit the atmosphere. These 1 2 3 molecules provide The Purification Process further disinfection and destroy any remaining The City of San Diego currently uses recycled water for irrigation and Reverse Osmosis – contaminants in the industrial purposes. The Demonstration Project is a pilot study to water by breaking them determine the feasibility of further purifying recycled water to supplement Barrier 2 down into harmless local supplies through augmentation. The Reverse osmosis is the second and compounds. project will determine if the meets , safety most essential step in the purification and regulatory requirements. The purification process uses the multi- process. Water is forced under high barrier approach of consecutive treatment steps, which work together to pressure through that San Diego is among many innovative cities remove or destroy unwanted materials. Each barrier includes frequent remove salt and , exploring water purification technology to purify wastewater for use as drinking water. and continuous water quality monitoring. Safeguards are built into the including and bacteria. T Demonstration Project Components ow n e G North City Water e C Mall n e tgate es n Eas Reclamation Plant The Advanced Water Purification Facility is one component of the e t e e 5 A r v e

Demonstration Project. Additional components include a study of D San Vicente Reservoir to determine the potential of augmenting r A look at the technology behind the the reservoir with purified water, an economic and energy analysis, Miramar Rd and defining regulatory requirements. In addition, an independent La Jolla Village Dr advisory panel of experts provides oversight and guidance. The Water Demonstration purified water will not be added to the San Vicente Reservoir during r Nobel D Purification Project the demonstration phase; instead it will be added to the existing 805 recycled water distribution system. For more information about G e n the project or to schedule a speakers bureau presentation for your e s e organization, visit www.purewatersd.org. e

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e Take a Look You are invited to tour the Advanced Water Purification Facility, the 52 test facility for California’s first indirect potable reuse via reservoir augmentation pilot project. During the walking tour you will see water To tour the facility, please register at purification technology up close and compare samples of purified water www.purewatersd.org/tours.shtml or call (619) 533-4631. produced at the facility to tap and recycled water — the difference is clear.

Tours are held Tuesdays and Thursdays and on occasional evenings and Saturdays. To tour the facility, please register at www.purewatersd.org/tours.shtml or City of San Diego call (619) 533-4631. Public Utilities Department 600 B Street, Suite 600 Exploring local resources to ensure San Diego, CA 92101 a sustainable water supply Project Information Line: (619) 533-7572 Project Speakers Bureau Line: (619) 533-6638 Tasting is Believing Email: [email protected] Orange County’s Replenishment System (GWR) is a full- Website: www.PureWaterSD.org scale advanced water purification facility located in Fountain Valley, California. The GWR System uses the same purification process being Water Purification Demonstration Project examined by the Demonstration Project to supply a safe and reliable water source to over 500,000 residents. As a full-scale facility, guests @PureWaterSD touring the GWR System are able to the purified water. To register PureWaterSD for a tour, visit www.GWRSystem.com. Printed on recycled paper. This information is available in alternative formats upon request. 6/12 LG