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City of San Diego's Recycled Water Study – Demand Management Approach

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The City of San Diego (City) conducted a recycled water study (Study) to: 1) identify opportunities to increase recycling and reclamation of wastewater for potable and non-potable uses; 2) determine the potential costs of implementation; and 3) establish the optimum amount of recycled water that could be deployed upstream of the Point Loma Wastewater Treatment Plant (Point Loma). The Study was initiated through a cooperative agreement with the City, the San Diego Coastkeeper, and the San Diego Chapter of Surfrider Foundation as part of the City's application process for the renewal of the National Pollutant Discharge Elimination System (NPDES) Permit and a 301(h) waiver. The waiver allows the City to continue operating Point Loma for 5 years with chemically-enhanced primary treatment (CEPT) from August 2010 to July 2015.

The primary objective of the Study is to develop reasonable alternatives that provide for potable and non-potable use of recycled water for the San Diego area through 2035. This includes supplying areas within the City's metropolitan service area as well as outside the City boundaries through collaboration with neighboring agencies. Estimates of future potable and non-potable water demands were used to examine the possibility of upgrading Point Loma to secondary level of treatment. The Study is an integral component of the City's ongoing water resources planning through calendar year (CY) 2035 that includes various other master planning and studies being conducted concurrently, including the Urban Water Master Plan, the Potable Water Demand Forecasts, and the Water Facilities Master Plan.

Keywords: direct potable reuse; indirect potable reuse; non-potable reuse; water recycling

Document Type: Research Article


Publication date: 2011-01-01

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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