Rialto Pipeline Invasive Mussel Control Pilot Study

The Metropolitan Water District of Southern California is entering into a funding agreement with the California Department of Water Resources to implement an invasive mussel mitigation pilot treatment at the Rialto Pipeline via the State Water Project. Located in San Bernardino, California, this pilot study is a critical component of Metropolitan's broader strategy to manage and control invasive mussel species to protect the Southern California raw water supply system. The project is classified as a forecast with a posted date of September 17, 2026, and is managed by Environmental Specialist Daniel Cardoza. According to a California Environmental Quality Act Notice of Exemption, the study is exempt from standard CEQA requirements as it involves administrative activities and the maintenance of existing facilities.