UWM Plan - Municipal Water District of Orange County

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Section 6 Recycled Water Table 6-3 below illustrates the current uses for recycled water within MWDOC’s service area. The usage is limited to landscape irrigation with a secondary and tertiary treatment level. Table 6-3: Current Recycled Water Uses (AFY) User Type Treatment Level Fiscal Year Ending 2010 Agriculture Landscape Secondary/Tertiary 39,642 Wildlife Habitat Wetlands Industrial Total 39,642 6.4. Potential Recycled Water Uses Potential recycled water use within MWDOC’s service area hinges upon many variables including, but not limited to, economics of treatment and distribution system extension (as well as site retrofits), water quality, public acceptance, infrastructure requirements, and reliability. Recycled water quality, in combination with the tolerance of landscaping to high total dissolved solid levels, plays a large role in whether irrigation with recycled water is feasible. Recycled water that has TDS levels that constantly or occasionally exceed the tolerance level of specific landscape requirements will result in adverse impacts to the landscape. Therefore, some users are not able to utilize recycled water unless TDS levels are held below specific plant-based thresholds. Even with high identified demands, it is not necessarily economically feasible to provide recycled water to all potential users. Expansion of recycled water systems eventually reaches a point where returns diminish and higher investments for expansion are not cost effective. Water recycling projects involve collecting and treating wastewater to applicable standards dependent upon the ultimate end use, storing recycled water for seasonal use, pipeline construction, pump station installation, and plumbing retrofits for existing end users or dual plumbing systems for new users. Creative solutions to secure funding, overcome regulatory requirements, institutional arrangements, and public acceptance are required to offset existing potable demands with potential recycled water demands. Municipal Water District of Orange County 2010 Regional Urban Water Management Plan Final 6-8
Section 6 Recycled Water OCWD Groundwater Replenishment System Expansion - At this time, OCWD has designed and approved proceeding with the Phase 2 expansion of GWRS, which will recycle approximately another 30 MGD of effluent. Investments beyond Phase 2 have not been approved by OCWD and would require further review before proceeding. If the further envisioned phase of the project is approved and developed, it is projected that up to 120 MGD of water will be produced. IRWD Michelson Water Reclamation Plant Expansion - Michelson Water Reclamation Plant (MWRP) currently has a maximum influent capacity of 18 MGD. To keep up with a growing demand for potable water and a decreasing imported water supply, IRWD will increase the capacity from 18 MGD to 28 MGD by 2025. Design of this project started in September 2006 and was completed in March 2009. Construction began in September 2009 and is anticipated to be completed by July 2012. San Clemente Water Reclamation Plant Expansion - The San Clemente Water Reclamation Plant located within the City currently has a capacity of 2.2 MGD. The City of San Clemente plans to expand the plant to 4.4 MGD. The expansion will include nearly 9 miles of pipelines, conversion of a domestic water reservoir to recycled water storage, and a pressure reducing station as well as an interconnection with SMWD. Design of this project was completed in spring 2010 and construction is estimated to begin in the fall of 2011 with the first phase of new recycled water customers to come online in 2013. SMWD Chiquita Water Reclamation Plant Expansion - Chiquita Water Reclamation Plant (CWRP) currently has a capacity of 5 MGD. SMWD plans to expand the plant to 10 MGD by 2015. The expansion will increase total production and reduce dependency on imported water. SCWD Aliso Creek Water Harvesting Project - SCWD has conducted a preliminary investigation of a project to intercept and treat a portion of the urban runoff in lower Aliso Creek to supplement the recycled water system. This would improve the quality of the recycled water supply to make it more attractive for irrigation users. Treatment would include filtration and reverse osmosis facilities near SOCWA’s CTP. The plant would produce up to 0.5 MGD of low TDS water. Tables 6-4 and 6-5 represent projected recycled water use within MWDOC’s service area through 2035. Recycled water use will increase by 50% through the 25-year period, with landscape irrigation as its sole use. Municipal Water District of Orange County 2010 Regional Urban Water Management Plan Final 6-9
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Municipal Water District of Orange
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Table of Contents Contents Executiv
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Table of Contents 6. Recycled Water
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Table of Contents List of Figures F
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Acronyms GAC GAP GMFP GPCD gpm GRF
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Message from the Board of Directors
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Executive Summary • Offer opportu
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Executive Summary When comparing su
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Executive Summary • Promoting par
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1. Introduction 1.1. Urban Water Ma
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Section 1 Introduction • Long-ran
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Section 1 Introduction term by vote
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Section 1 Introduction For more tha
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Section 1 Introduction Orange Count
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Section 2 Water Demand 600,000 2.5
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Section 2 Water Demand Table 2-1: C
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Section 2 Water Demand used to fill
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Section 2 Water Demand Baseline and
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Section 2 Water Demand o 10 percent
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Section 2 Water Demand These target
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Section 2 Water Demand under SBx7-7
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Section 2 Water Demand Legislation
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3. Water Sources and Supply Reliabi
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Section 3 Water Sources and Supply
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3.2.3. State Water Project (SWP) Se
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State Water Project Programs and Lo
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3.3.2. San Juan Basin Section 3 Wat
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3.3.8. Recharge Facilities for OCWD
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Page 157 and 158: CALIFORNIA WATER CODE DIVISION 6 PA
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Calif. Water No. UWMP requirement a
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Municipal Water District of Orange
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List of Tables and Figures TABLES T
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Section 2: Metropolitan Water Distr
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Section 3: Development Process In p
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MWDOC’s allocation plan. Moreover
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Base Period Interim Agricultural Wa
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Shortage Levels: The model allocate
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to 2008; in order to incorporate th
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Section 5: Plan Implementation This
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agencies and Board Committee member
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Tracking and Reporting In preparing
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It important to note, MWDOC does no
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Appendix A List of Acronyms: AF- Ac
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Appendix C MWDOC Growth Adjustment
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Appendix F Letters of Notification
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Appendix H Resolution of Adoption o
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8001 Irvine Center Drive, Suite 110
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UWM Plan - Municipal Water District of Orange County

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