The Water Agency manages and maintains a water supply and transmission system that provides naturally filtered Russian River water to nine cities and special districts that in turn delivers drinking water to more than 600,000 residents in portions of Sonoma and Marin counties.  You receive your drinking water and water bill from your local city or water district.  The Water Agency provides drinking water to the following cities and special districts: 

    City of Santa Rosa

    Town of Windsor

    Marin Municipal Water District

    City of Cotati

    City of Sonoma

    City of Rohnert Park

    Valley of the Moon Water District

    City of Petaluma

    North Marin Water District




    Water Delivery Data