Chartered in 1912, Marin Water is California’s first and the oldest municipal water district. Today, we provide local water service to more than 191,000 people in central and southern Marin. About 75% of our water supply originates from rainfall on 22,000 acres of our protected Mt. Tamalpais Watershed and in the grassy hills of west Marin. Rainfall from the watershed flows into the District’s seven reservoirs. The water is treated at our treatment plants and then travels through our extensive distribution system, including 908 miles of pipes, 130 storage tanks and 97 pump stations before making its way to our customers. The District also supplements its water supply with water from the Sonoma County Water Agency, which comes from the Russian River system in Sonoma County. Our dedicated staff uphold Marin Water's proud history of service and mission to manage the lands, water, and facilities in our trust to provide reliable, high-quality water and adapt and sustain these precious resources for the future.