2.3 Regional Planning and Regional Alliance
IRWD is the largest member agency of the Municipal Water District of Orange County (MWDOC) in terms of service area and overall water use. MWDOC is a wholesale importer of water from the Metropolitan Water District of Southern California (Metropolitan). MWDOC serves all of Orange County except for the cities of Anaheim, Fullerton, and Santa Ana. IRWD coordinated the preparation of this 2025 UWMP directly with MWDOC staff. References to the regional UWMP(s) are made throughout the document as prepared by both Metropolitan and MWDOC. IRWD, as an urban water supplier, developed this 2025 UWMP based solely on the District’s service area. This individual UWMP addresses all requirements of the CWC. IRWD has notified and coordinated with MWDOC and IRWD’s stakeholders on the preparation of the 2025 UWMP. IRWD’s Board of Directors, its governing body, must adopt IRWD’s UWMP before submittal to DWR. IRWD’s required information related to UWMP Identification and participation in a Regional Alliance is shown in DWR Table 2-2 . Table 2- 2. DWR Submittal Table Plan Identification
Submittal Table 2-2: Plan Identification
Name of Regional Alliance or RUWMP (Drop Down List)
Select One
Type of Plan
Individual UWMP If Water Supplier is also a member of a SB X7-7 Regional Alliance, select name from the drop-down. Regional Urban Water Management Plan (RUWMP) If Supplier selected RUWMP, select name from the drop-down.
Orange County 20x2020 Regional Alliance
NOTES:
2.4 Standardized Tables, Year, and Units of Measurement
Law
10644(a)(2) The plan, or amendments to the plan, submitted to the department…shall include standardized forms, tables or displays specified by the department.
IRWD utilized the standardized forms provided by DWR in the 2025 UWMP. The CWC provides water suppliers the authority to report on either a fiscal year (FY) or calendar year basis. In the 2025 UWMP, IRWD reports data on a FY basis with each FY starting on July 1 and ending on June 30. For example, for reporting water use and supply information for 2025, IRWD uses its
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IRWD – 2025 Urban Water Management Plan
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