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Issue link: http://wateronline.epubxp.com/i/529674
27 cities, water districts, and private utilities within three neighboring counties. In 2012, SFPUC spearheaded an effort to create a local program for regulating on-site water use called the Nonpotable Water Program. The Nonpotable Water Program creates a streamlined process for commercial, multi-family, and mixed-use developments in San Francisco to collect, treat, and reuse water for toilet flushing, irrigation, and other nonpotable uses. The program allows the collection and treatment of alternate water sources to occur within one building or for multiple buildings to share treated alternate water sources for nonpotable uses. Established through an ordinance adopted by the San Francisco Board of Supervisors, this voluntary program encourages the use of water generated on site to expand water savings and further diversify SFPUC's water supply portfolio: • Rainwater — precipitation collected from roofs or other manmade above- grade surfaces • Stormwater — precipitation collected from at- or below-grade surfaces • Graywater — wastewater from bath- room sinks, showers, and washing machines • Blackwater — graywater and waste- water from kitchen sinks and toilets • Foundation drainage — nuisance groundwater that floods basements • Other sources as approved by the San Francisco Department of Public Health (SFDPH). Developers and designers are responding to San Francisco's program by incorporating innovative on-site nonpotable water use systems into their projects — such as treating graywater for toilet flushing or using rainwater for spray irrigation. More than 20 new developments in San Francisco are proposing to collect, treat, and use a variety of alternate water sources for nonpotable applications. For its momentum in San Francisco and worldwide and as a sustainable solution in the age of water scarcity, the Blueprint for On-site Water Systems is much more than the name suggests. It's a blueprint for the future. wateronline.com ■ Water Innovations DECENTRALIZEDSYSTEMS 29 Innovative Chemical Feed Solutions * * NEW PRODUCT * * Model 4100-EC Automatic Liquid Vacuum Feeder Feed the following chemicals safely under vacuum conditions: Sodium Hypochlorite / Sodium Bisulfite / Liquid Ammonium Sulfate / Sodium Chlorite / Hydrofluorosilicic Acid / Copper Sulfate Solution / Poly Aluminum Chloride / Liquid Aluminium Sulfate / Sulfuric Acid / Hydrochloric Acid / Emulsion Polymers About The Authors Carita Parks, MBA, WERF commu- nications manager, has more than a decade of experience crafting successful communications mes- sages and strategies promoting WERF's comprehensive water quality research program. Theresa Connor, PE, is the WERF program director for Stormwater and Decentralized Systems as well as Sustainable Integrated Water Management. Research areas include green/gray infrastructure issues, land use planning consider- ations, and onsite water systems.