Item 27 - Water Supply Assessment for Cabrillo Town Center Project

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Cabrillo Town Center WATER SUPPLY ASSESSMENT FEBRUARY 13, 2023 15 decreased below the 10-year average due to the result of Governor Jerry Brown’s mandatory water conservation in 2014. With the City’s combined use of potable and non-potable water it ranged from 33,418 to 35,343 between FY2015/16 and FY2019/20. Residential, CII, and large landscape make up the use for potable water. Non-potable use includes the use of recycled water for large landscape and golf course irrigation. Additional details on the strategic management of these resources are explained below. OCWD Groundwater The primary source of water for the City is the Orange County Groundwater Basin (“OC Basin”) which is managed by the Orange County Water District (OCWD). The OC Basin underlies the north half of Orange County beneath broad lowlands. The OC Basin covers an area of approximately 350 square miles, bordered by the Coyote and Chino Hills to the north, the Santa Ana Mountains to the northeast, the Pacific Ocean to the southwest, and terminates at the Orange County line to the northwest, where its aquifer systems continue into the Central Basin of Los Angeles County. The OC Basin storage capacity is estimated to be 66 million AF4, of which only a fraction is available for use to prevent against physical damage to the Basin such as seawater intrusion or land subsidence. To ensure the Basin is not overdrawn, OCWD recharges the Basin with local and imported water. The Basin is recharged primarily by four sources including local rainfall, storm and base flows form the Santa Ana River (SAR), purchased Metropolitan imported water; and highly treated recycled wastewater. Basin recharge occurs largely in the following recharge basins that are in or adjacent to the City of Anaheim: Warner Basin: A 50-foot-deep recharge basin located next to the SAR at the intersection of the 55 and 91 freeways. Burris Basin: Located between Lincoln Avenue and Ball Road in the City of Anaheim. Kraemer Basin: Located adjacent to Burris Pit. Santiago Creek: Located in the City of Orange between Villa Park Road and E. Bond Avenue. As mentioned above, SB 1262 amended Section 10910 of the Water Code and requires the inclusion of SGMA-related information in WSAs. Specifically, following the SGMA basin prioritization and designations5, for a non-adjudicated basin that is designated as high- or medium-priority pursuant to Section 10722.4, information regarding the following must be included: Whether the department has identified the basin as being subject to critical conditions of overdraft pursuant to Section 12924. 4 OCWD Groundwater Management Plan 2015 Update. June 17, 2015. 5 SGMA Groundwater Information Center Interactive Map Application, found here: https://sgma.water.ca.gov/webgis/?appid=SGMADataViewer#gwlevels