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 Pure Water Project Las Virgenes – Triunfo. 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.

Pure Water FAQs

See the documents below for more information on these options. 

March 1, 2019

The National Academy of Sciences  assessment of water reuse as an approach to meet future water supply needs.Water Reuse: Potential for Expanding the Nation's Water Supply Through Reuse of Municipal Wastewater (2012)

December 6, 2018

The U.S. Department of the Interior, Bureau of Reclamation has informed us that the Pure Water Project Feasibility Study was found to be in accordance with its Directives and Standards; see the letter here.

October 31, 2018

The Las Virgenes – Triunfo Joint Powers Authority (JPA) received a grant from the U.S. Bureau of Reclamation (BOR) to perform the Feasibility Study under its Water Reclamation and Reuse (Title XVI) Program. The JPA operates the Tapia Water Reclamation Facility (TWRF or Tapia WRF) that provides wastewater treatment service for approximately 100,000 residents in the Las Virgenes Municipal Water District (LVMWD) and Trunfio Sanitation District (TSD) service areas. The JPA is the project sponsor and will own and operate the proposed Project. This report has been prepared for the JPA in accordance with BOR’s Reclamation Manual Directives and Standards (WTR 11-01) - this PDF is 17 MB, depending on your Internet connection, it may take a while to download.

July 13, 2018

Here are the findings and recommendations from the National Water Research Institute (NWRI) Independent Advisory Panel - NWRI Panel Final Memo


July 11, 2018

Joe McDermott, Director of Resource Conservation and Public Outreach meets with Dave Pedersen, General Manager for Pure Water Episode 2 at the Tapia Water Reclamation Facility.  In this episode, they talk about wastewater treatment, Pure Water and how LVWMD and Triunfo Sanitation District are working to ensure long term water reliability and watershed leadership through local resources and innovative technology.



May 30, 2018

Curious as to what the Pure Water Project is all about?

General Manager Dave Pedersen and Director of Resource Conservation and Public Outreach Joe McDermott meet in this first of a series of videos to discuss the Pure Water Project.  In this episode, they discuss the current status of this innovative project.


February 5, 2018

Pure Water Project Las Virgenes-Triunfo: Advanced Water Treatment Plan - Draft Preliminary Siting Study (PDF - 5.4MB)

Pure Water Project Las Virgenes-Triunfo: Modeling of Las Virgenes - Reservoir for Indirect Potable Reuse through Surface Water Augmentation (PDF)

September 2017

Pure Water Project Demonstration Project Preliminary Design Report (PDF - 9.12MB)

Grant Agreement Signed (PDF - 3.77MB)

July 2017

Notice of Intent to Adopt a Mitigated Negative Declaration - 30800 Agoura Rd - PDF

JPA Acquisition of 30800 Agoura Rd - Draft Initial Study/Negative Declaration - PDF

June 2017

The Los Angeles Regional Water Quality Control Board issued a new five-year operating permit for the JPA’s Tapia Water Reclamation Facility.

Included in the permit is a schedule for the JPA to proceed with the construction of an Advanced Water Treatment Facility that will greatly reduce or eliminate the need to discharge treated wastewater to Malibu Creek.

Read the news release.

May 2017

The federal Bureau of Reclamation has awarded $450,000 in grants to the JPA to study the feasibility of the Pure Water Project and toward the design of a demonstration facility to be used for public education and staff training.

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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