In 1964, the Las Virgenes - Triunfo Joint Powers Authority (JPA) was established between Las Virgenes and Triunfo Water & Sanitation Districts to treat wastewater within the Malibu Creek watershed. The JPA owns and operates the Tapia Water Reclamation Facility (Tapia). Tapia began operating at 0.5 million gallons per day in 1965. In 1972, the district began the practice of applying recycled water from Tapia to local landscapes.

In light of burgeoning local population in the late 1980s and early 1990s, Tapia's capacity was again expanded to its ultimate build-out of 16 million gallons per day. In 1994, the JPA began operations at the Rancho Las Virgenes Composting Facility which transforms biosolids extracted from wastewater into market-ready soil amendment.

The JPA Board is scheduled to meet at 5 p.m. on the first Monday of each month and the location alternates between the two agencies headquarters.