SMWD Advanced Purified Water Project

Lake Mission Viejo first recreational lake in California to use Advanced Purified Water for refill

Water district, City and HOA join to in public/private partnership
to make historic change in water use in Orange County

Santa Margarita Water District officials were joined by Mayor Frank Ury, Mission Viejo; Fran Spivey-Weber, Vice Chair of the State Water Resources Control Board; Kevin Pennington, President of the Lake Mission Viejo Homeowners Association, and other local and state elected officials and dignitaries to celebrate the new system that will, for the first time ever, fill Lake Mission Viejo with 114 million gallons of Advanced Purified Water in lieu of potable water. This new system will reportedly save that potable water for other uses and make Lake Mission Viejo the largest swimmable lake in the state; perhaps the nation, to use advanced purified water.

The treatment method involves taking already highly treated wastewater and treating it further in a process that includes advanced filtration tanks, reverse osmosis and ultraviolet light. This additional purification makes it safe to supply the lake for swimming and other recreational activities.

“In the last three years, as the current drought has intensified, the question of the lake-fill water, the use of drinking water for that purpose, has taken on new, critical importance,” said SMWD Board President Charley Wilson.

“It was last year, when the District, our constituent cities, and all of our customers became intensely focused on the demands of the drought that this simple, but profound idea of taking our already highly-treated recycled water and providing an extra level of treatment to meet the lake fill requirements, brought all these partners together to find and effect a change that would benefit all the parties.”

Fran Spivey-Weber, Vice Chairwoman of the State Water Resources Control Board, called the project a model for water providers across the state.

Dignitaries at the ceremony symbolically put the first of the Advanced Purified Water into the lake from fishbowls containing fish that inhabit the 124-acre lake.

Ironically, the state was gripped by drought when the lake was built in 1976. It was finally filled in 1978. The lake loses about 500,000 gallons a day to evaporation--enough water to supply about 1,400 families for a year.

In 2015, as the current drought continued to tighten its grip on the state, SMWD officials grew concerned about continuing to pump drinking water into the recreational facility.

The water district approached the Lake Mission Viejo Association last year about using Advanced Purified Water to replenish the lake. Homeowners overwhelmingly approved the change. The City of Mission Viejo subsequently agreed to loan SMWD $3 million for the project and also provide a $1 million grant to help the water district build the new treatment facility to purify the recycled water. The water district will pay off the loan over 20 years, at 2.5 percent interest. The agreement also calls for the city to receive enough recycled water to irrigate about 80 percent of its parks, medians and slopes for 25 years at a discount. The Lake Association will repay Santa Margarita an estimated $5.1 million in construction costs over 20 years.

 

Santa Margarita Water District Board President describes the historic importance of the Lake Mission Viejo Advanced Purified Water Facility to the region. Pictured (l to r) SMWD President Wilson; State Water Resources Control Board Vice Chairperson, Fran Spivey-Weber; City of Mission Viejo Mayor, Frank Ury; Lake Mission Viejo Homeowners Association President, Kevin Pennington

 

State Water Resources Control Board Vice Chairperson, Fran Spivey-Weber expressed the appreciation of the SWRCB to SMWD and partners for taking on an innovative solution to water-savings with the implementation of the Lake Mission Viejo Advanced Purified Water Facility. Pictured (l to r) Santa Margarita Water District Board President, Charley Wilson; Vice Chairperson, Spivey-Weber; City of Mission Viejo Mayor, Frank Ury; Lake Mission Viejo Homeowners Association President, Kevin Pennington

 

Lake Mission Viejo Advanced Purified Water Facility partners and guests prepare to put into Lake Mission Viejo the first of the new advanced purified water—along with some new, healthy fish. Pictured (l to r) SMWD Board President Charley Wilson; Mission Viejo Mayor, Frank Ury; SWRCB Vice Chairperson, Fran Spivey-Weber; 73rd District Assemblyman, Bill Brough; Lake Mission Viejo Homeowners Association President, Kevin Pennington

 


About the Project

The Lake Mission Viejo Association (Association) owns and operates the 124-acre lake located at Alicia Parkway and Marguerite Parkway in Mission Viejo.  The lake, which holds approximately 350 acre feet of water, is maintained with a combination of water sources, including potable water supplies provided by Santa Margarita Water District.

In light of the ongoing drought conditions and in support of future water supplies, the Association evaluated alternative water sources to replace the use of potable water from the District.  The idea is to maintain lake water elevation levels with a sustainable, reliable, cost-effective source of local non-potable water that meets the water quality standards desired for the continued recreational use of the lake.

At the same time, the District is working to maximize its supply of potable water for domestic use. SMWD currently produces recycled water that is treated to standards for irrigation and other non-potable uses in accordance with Title 22 of the California Code of Regulations, including for use in recreational lakes.

The Association currently purchases this recycled water from SMWD for irrigation.  While Title 22 water can legally be used in the lake, the Association has determined that the Association members want a higher water quality standard for the recreational uses of the lake by the members. The District, working with the Association, has determined that with additional treatment infrastructure, it can produce higher quality recycled water to meet the needs and demands of the Association at the lake.

What is Advanced Purified Water (APW)?
Advanced Purified Water is recycled water that has received additional levels of treatment to polish the water to the Lake Mission Viejo Association’s water quality specifications.

Is Advanced Purified Water safe?
Yes, Advanced Purified Water is safe for recreational activities, including swimming, at Lake Mission Viejo. 

Prior to the extra treatment, Santa Margarita Water District’s recycled water meets state and federal health regulations for swimming lakes (Title 22 of the California Code of Regulations).

Is Advanced Purified Water safe for human consumption?
While no ill effects would be anticipated from consuming APW, it is not yet approved for human consumption.

SMWD currently produces recycled water that is treated to standards for irrigation and other unrestricted non-potable uses in accordance with Title 22 of the California Code of Regulations (“Title 22”); including for use in recreational lakes. 

LVMA currently purchases Title 22 recycled water from SMWD for irrigation and while Title 22 water can legally be used in the Lake, LVMA has determined that a higher water quality is desirable to maintain the lake quality to support the various recreational uses of the Lake by LVMA members. The District, in consultation with LVMA, has determined that with additional treatment infrastructure, it can produce higher quality recycled water to such standards and in adequate quantities as are necessary to meet the needs of LVMA at the Lake.

How much will the project cost?
The projected is expected to cost $5 million. The project is estimated to pay a premium for the water for 20-25 years

Who will pay for the project?
The Lake Mission Viejo Association will pay the capital costs of the APW treatment facility and for the water that is ultimately delivered for use in the lake.

Who approved the project?
Delegates representing the 81 neighborhoods within the 24,217-home Lake Mission Viejo Association voted unanimously to switch to Advanced Purified Water for lake refill and end nearly 40 years of using potable (drinking) water to maintain water levels in the 124-acre Orange County lake. In all, delegates cast 19,803 votes – representing 82 percent of the Association’s homeowners – all in favor of the Association working with the Santa Margarita Water District to construct a new treatment plant to produce Advanced Purified Water for the lake.

When will the project be completed?
Lake Mission Viejo will be filled with Advanced Purified Water by the end of August 2016.

NOI for SMWD Advanced Purified Water Project

LMVA APW Project - Draft IS-MND

Appendix A - Air Quality and Greenhouse Gas Calculations

Appendix B - Biological Resources

Appendix C - Cultural Resources Inventory

Appendix D - Hazards Assessment

Appendix E - Field Noise Measurement Data

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