Lessons Learned from Four Years of Demonstration Testing at the Las Virgenes-Triunfo Pure Water Project

The Las Virgenes-Triunfo Pure Water Project demonstration facility testing program is described for advanced treatment of recycled wastewater for potable reuse. The facility, representing a cooperative effort between two water districts, evaluates preformed chloramine implementation, ultrafiltration and reverse osmosis performance, and pathogen removal credits for direct potable reuse compliance. Focus areas include meeting upcoming nitrogen and phosphorus TMDL requirements with full-scale compliance targeted for 2030.