Quick Facts

    About the Sonoma County Water Agency:

    • The Sonoma County Water Agency was created as a special district in 1949 by the California Legislature to act as the local sponsor for federal flood protection and water supply projects known collectively as the Russian River Project.
    • The Water Agency is a wholesale water supplier to nine cities and water districts that serve more than 600,000 residents in portions of Sonoma and Marin counties. 
    • The Water Agency manages and operates the Russian River water supply system conjunctively with the Army Corps of Engineers.
    • The Water Agency also manages eight sanitation districts and zones in Sonoma County. 
    • The mission of the Water Agency is to effectively manage the resources in our care for the benefit of people and the environment in our service area.
    • The Water Agency is a special district.  The Sonoma County Board of Supervisors acts as the Water Agency's Board of Directors.   

    Our Customers:

    Serving over 600,000 residents in Sonoma and Marin counties, the Sonoma County Water Agency is the primary provider of drinking water. The Water Agency's direct customers are eight cities and water districts in Sonoma and Marin Counties to whom we sell water, each of which help make decisions about water supply issues that affect their customers by participating in the Water Advisory Committee. Our customers are:

    • City of Cotati
    • City of Petaluma
    • City of Rohnert Park
    • City of Santa Rosa
    • City of Sonoma
    • The Town of Windsor
    • Marin Municipal Water District
    • North Marin Water District
    • Valley of the Moon Water District

    Water Facts:

    • In 2009, the Water Agency delivered approximately 46,000 acre-feet of water to its wholesale contractors – the lowest delivery in more than a decade.
    • One acre-foot is the volume of water sufficient to cover an acre of land to a depth of 1 foot.
    • A standard football field is just over one acre. That means Lake Sonoma ‘s water capacity is equivalent to 288,636 football fields.
    • One-acre foot of water is the same as 326,000 gallons
    • On average, a family in Santa Rosa uses approximately 99,000 gallons of water per year
    • One acre-foot of water is enough to provide drinking water for three families of four people in Santa Rosa