Item 27 - Water Supply Assessment for Cabrillo Town Center Project

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Santa Ana 2020 Urban Water Management Plan arcadis.com 6-23 Stormwater 6.5.1 Existing Sources There are, currently, no direct stormwater uses in the City’s Service area. 6.5.2 Planned Future Sources As of 2021, there are no planned stormwater uses in the City’s service area. Wastewater and Recycled Water The City is directly involved in wastewater services through its ownership and operation of the wastewater collection system in its service area. However, the City does not own or operate wastewater treatment facilities. The sewer system service area encompasses about 27.2 square miles and includes approximately 390 miles of sewer main. The wastewater system serves about 335,605 residents (Santa Ana’s Sewer Master Plan, 2016). For additional details on the City’s wastewater services, refer to the 2016 Santa Ana Sewer Master Plan. Recycled water is wastewater that is treated through primary, secondary, and tertiary processes and is acceptable for most non-potable water purposes such as irrigation, and commercial and industrial process water per Title 22 requirements. Recycled water opportunities have continued to grow in Southern California as public acceptance and the need to expand local water resources continues to be a priority. Recycled water also provides a degree of flexibility and added reliability during drought conditions when imported water supplies are restricted. The City is indirectly involved in recycled water production, through its supply of wastewater for IPR. The following sections expand on the existing agency collaboration involved in these efforts as well as the City’s projected recycled water use over the next 25 years. 6.6.1 Agency Coordination The City does not own or operate wastewater treatment facilities and sends all collected wastewater to Orange County Sanitation District (OC San) for treatment and disposal. OC San provides treated water to OCWD, the manager of the Orange County Groundwater Basin. OCWD strives to maintain and increase the reliability of the Orange County Groundwater Basin through replenishment with imported water, stormwater, and advanced treated wastewater. A full description of the Orange County Groundwater Basin is available in Section 6.3.2. OCWD and OC San have jointly constructed and expanded two water recycling projects to meet this goal including: 1) OCWD GAP, and 2) OCWD GWRS. 6.6.1.1 OCWD Green Acres Project OCWD owns and operates the GAP, a water recycling system that provides up to 8,400 AFY of recycled water for irrigation and industrial uses. GAP provides an alternate source of water that is mainly delivered to parks, golf courses, greenbelts, cemeteries, and nurseries in the cities of Costa Mesa, Fountain Valley, Newport Beach, and Santa Ana. OCWD produces and distributes GAP water for purchase by the City, which sells and distributes the water to recycled water customers. Approximately 100 sites use