Pure Water Project - Las Virgenes - Triunfo

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Pure Water Project


For some time, Las Virgenes – Triunfo Joint Powers Authority (JPA) had been considering the feasibility of a seasonal storage facility that would store surplus recycled water (RW) from off-peak times for use during times of peak demand, where on occasion, the need exceeds the available supply.

Seasonal storage would reduce (but not eliminate) the need to discharge excess RW to Malibu Creek, when such releases are permitted (November 15 to April 15). It would also make it possible to use more of this resource for irrigating parks, highway landscapes, golf courses, school grounds, commercial landscapes and garden areas of multi-family dwellings.  Using RW for these purposes also reduces the demand for imported water in the JPA’s service areas, conserving both water and energy.

However, a stakeholder-driven process has led to another option, the notion of Indirect Potable Reuse (IPR), now known as the Las Virgenes – Triunfo Pure Water Project. This option would take surplus recycled water and process it through an advanced treatment facility; then store it at Las Virgenes Reservoir for later use as drinking water.

See the documents below for more information on these options.

Updated March 13, 2017


March 2017

Las Virgenes – Triunfo JPA Board Members and staff visited congressional offices in Washington D.C. to familiarize elected representatives and federal agencies with the JPA’s Pure Water Project and to explore funding assistance opportunities.

Director Iceland, Director Polan, Congressman Sherman, and Director Lewitt

left to right: Director Iceland, Director Polan, Congressman Sherman and Director Lewitt

 Director Polan, General Manager Pedersen, and Director Lewitt

left to right: Director Polan, General Manager Pedersen, and Director Lewitt

February 8, 2017

Pure Water Project Brochure, this four-page publication provides a high-level overview, describing the basis, projected timeline and background of the Pure Water Project.

October 6, 2016

The Las Virgenes – Triunfo JPA Board designates the name “Pure Water Project Las Virgenes – Triunfo” to replace “Recycled Water – Excess Supply Options.”

September 1, 2016

Seasonal Storage Options - Basis of Design Report (PDF - 14.1MB)

Seasonal Storage Options - Basis of Design Report Appendices (PDF - 58MB)

August 3, 2016 

The JPA Voted to Explore Indirect Potable Reuse

February 23, 2016 

Interpretive Handout Materials – Surplus Recycled Water Options

January 27, 2016

Special Meeting of the JPA - Recycled Water Seasonal Storage Project: Basis of Design Workshop No. 2 (PDF - 2.7MB)

July 6, 2015 

March 18, 2015 - Special Meeting of the JPA: Workshop No. 3

February 11, 2015 – Special Meeting of the JPA: Workshop No. 2


January 29, 2015 - Special Meeting of the JPA: Workshop No. 1

A study group began exploring the possible uses and storage of this excess RW. The group is comprised of Malibu Creek Watershed stakeholders including non-government entities, environmental interests, city, county, state and National Park representatives, JPA Board members and water industry personnel.


November 3, 2014 – JPA Board accepted proposal from Montgomery Watson Harza Global, Inc. (MWH) in the amount of $174,716 to prepare a Seasonal Storage Plan of Action and authorize the Administering Agent/General Manager to execute a professional services agreement for the work.

June 2, 2014 – JPA Board approved the Guiding Principles for Recycled Water Seasonal Storage Project.

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