6
Section 6 | System Supplies
Law
10631(b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments as described in subdivision (a).
10620(f) Describe water management tools and options to maximize resources and minimize the need to import water from other regions.
This section provides an overview of each of IRWD’s available supply sources including relevant information on rights to water supplies, supply capacities, risk analyses, and energy intensity. This section also includes a discussion of ways that IRWD maximizes its local resources to minimize the need to purchase imported water. IRWD’s Water Resources Master Plan (WRMP), a primary planning document, provides details on current and potential future potable and non-potable water supplies. It also outlines the development of a preferred supply mix focusing on reliability and identifies the optimum mix of water resources to meet normal, dry year, extended drought and emergency requirements. IRWD's water resource portfolio consists of imported water, local groundwater, recycled water, and local surface water. Treated and untreated imported water is purchased from the Metropolitan Water District of Southern California (Metropolitan) through the Municipal Water District of Orange County (MWDOC). Potable and non-potable groundwater supplies are extracted from both the Main Orange County Groundwater Basin and the Irvine Sub ‐ Basin. Recycled water production at IRWD’s Michelson and Los Alisos Water Recycling Plants are primary supplies to IRWD’s non-potable distribution system. IRWD’s primary mission is to provide a safe and reliable water supply to its customers. Since supply diversity directly enhances supply reliability, the District has and will continue to develop and advocate for a diverse mix of supply resources. The District has placed an emphasis on becoming less reliant on imported supplies. In FY 2000-2001, approximately 56% of IRWD’s total water supplies were from local sources; today, local supplies make up about 80% of IRWD’s supplies.
6 - 1
IRWD – 2025 Urban Water Management Plan
Powered by FlippingBook