Orange County Water & Wastewater Multi-Jurisdictional Hazard Mitigation Plan 2024
platforms Facebook, X (formerly known as Twitter), LinkedIn, and Nextdoor were made on August 21, 2024, regarding the MJHMP to increase exposure. IRWD has been diligent in continuing to distribute information using their in-person board meetings, social media and web-based platforms to ensure their customers are aware of the project and have an opportunity to share their feedback. O.3 JURISDICTION PROFILE Service Population: 425,208 IRWD is an independent special district serving multiple jurisdictions in central Orange County, California. The jurisdictions covered by IRWD include Unincorporated Orange County and portions of the Cities of Orange, Tustin, Santa Ana, Costa Mesa, Newport Beach, Laguna Woods, Lake Forest, and Irvine. IRWD provides potable drinking water, wastewater collection and treatment, recycled water, and urban runoff treatment to customers in the service area. IRWD also participates in water banking activities to create emergency supplies and protect against drought conditions or other water shortages. IRWD provides water and wastewater services to approximately 425,208 residential customers and serves a district daytime population of over 600,000 people. IRWD’s water supply portfolio includes groundwater (clear and treated), imported water, recycled water, and local surface water. A breakdown of water distribution by type is provided below:
▪ Groundwater - 27,382 acre-feet per year ▪ Recycled Water 24,913 acre-feet per year ▪ Treated Groundwater 19,523 acre-feet per year ▪ Imported Water 17,398 acre-feet per year ▪ Local Surface Water 5,165 acre-feet per year
IRWD is governed by a five-member publicly elected Board of Directors, responsible for IRWD’s policies and decision making. Day-to-day operations are supervised by the General Manager and IRWD staff. O.4 HAZARDS This section is intended to profile the hazards and assess the vulnerabilities that IRWD faces, distinct from that of the county-wide planning area. The hazard profiles in the MJHMP discuss overall impacts to the planning area and describe the hazard problem description, hazard extent, magnitude/severity, previous occurrences of hazard events and the likelihood of future occurrences. For more information on risk assessment methodologies, see Section 3 . IRWD’s service area is subject to most of the other hazards identified for the planning area. Many of these hazards are dispersed and may affect the entire region, including power outages, drought, seismic shaking, and windstorms. Based on the risk assessment, the IRWD development team discussed which hazards should or should not be profiled in the base plan. This discussion resulted in the identification of the following hazards that affect IRWD and summarized their probability of future occurrence, level of impact and significance as outlined in Exhibit O-3. Detailed hazard profiles for the planning area are provided in Section 3 of the base plan.
O-3
WSCP - 56
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