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Santa Ana 2020 Urban Water Management Plan <br />arcadis.com <br />1-1 <br />1 INTRODUCTION AND UWMP OVERVIEW <br />The City of Santa Ana (City) prepared this 2020 Urban Water Management Plan (UWMP or Plan) to <br />submit to the California Department of Water Resources (DWR) to satisfy the UWMP Act of 1983 <br />(Act or UWMP Act) and subsequent California Water Code (Water Code) requirements. The City is a <br />retail water supplier that provides water to its residents and other customers using the imported potable <br />water supply obtained from its regional wholesaler, Metropolitan Water District of Southern California <br />(MET), local groundwater from the Orange County Groundwater Basin (OC Basin), and recycled water <br />from the Orange County Water District (OCWD). The City, as one of MET’s 26 member agencies, <br />prepared this 2020 UWMP in collaboration with MET, Municipal Water District of Orange County <br />(MWDOC), OCWD, and other key agencies. <br />UWMPs are comprehensive documents that present an evaluation of a water supplier’s reliability over a <br />long-term (20-25 year) horizon. In response to the changing climatic conditions and regulatory updates <br />since the 2015 UWMP, the City has been proactively managing its water supply and demand. The water <br />loss audit program, water conservation measures and efforts for increased self-reliance in order to reduce <br />dependency on imported water from the Sacramento-San Joaquin River Delta (Delta) are some of the <br />water management efforts that the City is a part of to maintain the reliability of water supply for its service <br />area. <br />This 2020 UWMP provides an assessment of the present and future water supply sources and demands <br />within the City’s service area. It presents an update to the 2015 UWMP on City’s water resource needs, <br />water use efficiency programs, water reliability assessment and strategies to mitigate water shortage <br />conditions. It presents a new 2020 Water Shortage Contingency Plan (WSCP) designed to prepare for <br />and respond to water shortages. This 2020 UWMP contains all elements to meet compliance of the new <br />requirements of the Act as amended since 2015. <br />Overview of Urban Water Management Plan Requirements <br />The UWMP Act enacted by California legislature requires every urban water supplier (Supplier) providing <br />water for municipal purposes to more than 3,000 customers or supplying more than 3,000 acre-feet (AF) <br />of water annually to prepare, adopt, and file an UWMP with the California DWR every five years in the <br />years ending in zero and five. <br />For this 2020 UWMP cycle, DWR placed emphasis on achieving improvements for long term reliability <br />and resilience to drought and climate change in California. Legislation related to water supply planning in <br />California has evolved to address these issues, namely Making Conservation a Way of Life [Assembly <br />Bill (AB) 1668 and Senate Bill (SB) 606] and Water Loss Performance Standard SB555. New UWMP <br />requirements in 2020 are a direct result of these new water regulations. Two complementary components <br />were added to the 2020 UWMP. First is the WSCP to assess the Supplier’s near term 5-year drought risk <br />assessment (DRA) and provide a structured guide for the Supplier to deal with water shortages. Second <br />is the Annual Water Supply Demand Assessment (WSDA) to assess the current year plus one dry year <br />i.e., short-term demand/supply outlook. Analyses over near- and long-term horizons together will provide <br />a more complete picture of Supplier’s reliability and will serve to inform appropriate actions it needs to <br />take to build up capacity over the long term.