UWM Plan - Municipal Water District of Orange County

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Section 6 Recycled Water outfall extends 10,550 feet offshore near Doheny Beach and the mouth of San Juan Creek. Ultimately, the hydraulic capacity of the San Juan Creek Outfall will be expanded to 31.5 MGD. At a minimum, full secondary treatment is provided at wastewater treatment plants within the service area, with most plants exceeding this level of treatment. SOCWA Coastal Treatment Plant - SOCWA’s Coastal Treatment Plant (CTP) located in the City of Laguna Niguel has a maximum influent capacity of 6.7 MGD. Effluent has been treated to secondary or tertiary levels dependent upon disposal or reuse of the wastewater for recycling. Recycled water is treated to applicable Title 22 standards. Treated effluent that is not recycled is disposed through the Aliso Creek Outfall Ocean Outfall. In 2010, 4,400 acre-feet of dry weather flows were collected and treated on average of which 900 acre-feet was used as recycled water. SOCWA Joint Regional Treatment Plant - The Joint Regional Treatment Plant (JRTP) with a maximum influent capacity of 12 MGD lies within the City of Laguna Niguel and is operated by SOCWA. Effluent has been treated to secondary or tertiary levels dependent upon disposal or reuse of the wastewater for recycling. Recycled water is treated to applicable Title 22 standards. Non-recycled effluent is conveyed to the Aliso Creek Ocean Outfall via the SOCWA Effluent Transmission Main. In 2010, the JRTP received and treated an average dry weather flow of 10,420 acre-feet with 6,721 acre-feet treated to recycled water standards. SOCWA Plant 3A - Plant 3A is located within the City of Laguna Niguel and is operated by SOCWA. The maximum influent capacity is 6 MGD. Effluent has been treated to secondary or tertiary levels dependent upon disposal or reuse of the wastewater for recycling. Recycled water is treated to applicable Title 22 standards. Unused effluent is conveyed to the San Juan Creek Outfall via the 3A Effluent Transmission Main. On average, in 2010 Plant 3A received and treated 2,352 acre-feet of dry weather flows of which 1,266 acre-feet were treated to recycle water standards. SOCWA J. B. Latham Treatment Plant - SOCWA’s J. B. Latham Treatment Plant is the largest plant in the service area with a design capacity of 13 MGD. This plant is located in the City of Dana Point. Effluent is currently treated to secondary levels. Effluent is conveyed directly to the San Juan Creek Outfall. In 2010, the average dry weather flows collected and treated were 10,977 acre-feet. None of the treated effluent is currently being recycled. 6.3. Current Recycled Water Uses Recycled water is widely accepted as a source for direct use and indirect use of water supply throughout MWDOC’s service area. In the past, recycled water was mainly used for landscape irrigation. Large recycled water projects include: the Green Acres Project, Municipal Water District of Orange County 2010 Regional Urban Water Management Plan Final 6-4
Section 6 Recycled Water IRWD’s recycled water projects, and the GWRS. GWRS uses include injection for sea water barriers and groundwater recharge. Groundwater recharge will surpass landscape irrigation as the greatest consumer of recycled water in Orange County. IRWD is at the forefront of using recycled water not only for irrigation, but also for other uses such as toilet flushing and commercial uses. Other agencies in south Orange County, such as Moulton Niguel Water District and Santa Margarita Water District use a significant amount of recycled water. Recycled water in Orange County is treated to various levels dependent upon the ultimate end use and in accordance with Title 22 regulations. OCWD Green Acres Project - The Green Acres Project (GAP) is a water recycling effort that provides recycled water for landscape irrigation at parks, schools and golf courses as well as for industrial uses, such as carpet dyeing. GAP provides an alternate source of non-potable irrigation water to the cities of Fountain Valley, Huntington Beach, Newport Beach, Santa Ana, and Mesa Consolidated Water District. Current water users include Mile Square Park in Fountain Valley, Costa Mesa Golf Course, Home Ranch bean field and Chroma Systems carpet dyeing. Due to a growing demand for water in Orange County, it is sensible that recycled water be used whenever possible for irrigation and industrial uses to supplement groundwater. The GAP has the capacity to purify 7.5 MGD of reclaimed water from OCSD. OCWD Groundwater Replenishment System - The GWRS, which has been operational since January 2008, takes treated wastewater from Orange County Sanitation District and purifies it to levels that meet state and federal drinking water standards. It uses a threestep process that includes reverse osmosis, microfiltration and ultraviolet light and hydrogen peroxide advanced oxidation treatment. The treated water is then injected into the seawater barrier to help prevent seawater intrusion into the groundwater basin and is percolated into deep aquifers where it eventually becomes part of Orange County’s drinking water supply. The design and construction of the GWRS was a project jointly-funded by OCWD and OCSD. These two public agencies have worked together for more than 30 years and began the GWRS planning in the mid-1990s. They have led the way in water recycling and providing a locally-controlled, drought-proof and reliable supply of high-quality water in an environmentally sensitive and economical manner. The GWRS has a current production capacity of 70 MGD (23.5 billion gallons per year). Once the water has been treated with the three-step process at the GWRS, treatment facilities, approximately 35 MGD of GWRS water is pumped into injection wells where it serves as a seawater intrusion barrier. Another 35 MGD is pumped to recharge basins in the City of Anaheim, where GWRS water filters through sand and gravel to replenish the deep aquifers of north and central Orange County’s groundwater basin. Municipal Water District of Orange County 2010 Regional Urban Water Management Plan Final 6-5
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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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Agency: Municipal Water District of
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Urban Water Management Plan checkli
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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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