About 2

The Pure Water Project (PWP) Las Virgenes-Triunfo is a regional water reliability project that will transform surplus recycled water to create a sustainable, local, and drought-resilient water supply for communities in western Los Angeles and eastern Ventura Counties.

Led by the Las Virgenes-Triunfo Joint Powers Authority (JPA), the project will use proven, state-of-the-art purification technologies, membrane filtration, reverse osmosis, and ultraviolet light with advanced oxidation, recycled water will be purified to exceed California drinking water standards. The purified water will be conveyed to the Las Virgenes Reservoir, blended with imported water, and receive final treatment at the Westlake Filtration Plant before entering the distribution system.

When complete, the project will provide a reliable, locally controlled water source that strengthens the region’s long-term water security.

Origins and Background

The project’s origins trace back to the early 2010s, when the JPA began evaluating how to meet new regulatory requirements, reduce discharge from the Tapia Water Reclamation Facility into our local watershed, Malibu Creek, and develop a more reliable local water supply.

In 2013, the U.S. Environmental Protection Agency adopted a new Total Maximum Daily Load (TMDL) for Malibu Creek, creating more stringent requirements for discharged water and a major regulatory challenge, prompting the JPA to pursue a more sustainable long-term solution.

The project was developed in response to several critical challenges: increasingly stringent regulatory requirements for discharging treated effluent into Malibu Creek, seasonal changes in recycled water demand, limited local water supply options, and the region’s reliance on imported water from Northern California through the State Water Project.