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Water Agency

Working Today for Water Tomorrow

The mission of the Sonoma County Water Agency is to effectively manage the water resources in our care for the benefit of people and the environment through resource and environmental stewardship, technical innovation, and responsible fiscal management.

The Sonoma County Water Agency is a regional leader in water resources management. The Water Agency strives to look forward, beyond today's issues, to anticipate ways to advance its mission. Additionally, the Water Agency continues to adapt its mission in response to changing opportunities, keeping the Water Agency at the forefront of developments in the water industry.

The Water Agency was created as a special district in 1949 by the California Legislature to provide flood protection and water supply services. Legislation enacted in 1995 added the treatment and disposal of wastewater to the Water Agency's responsibilities. The Sonoma County Board of Supervisors acts as the Water Agency's Board of Directors. The Water Agency is a separate legal entity created by State law, having specific limited purposes and powers, and separate sources of funding.

  • Sonoma Water
    Published on September 10, 2021

    La Agencia de Agua del Condado de Sonoma y el Supervisor del Segundo Distrito, David Rabbitt, organizarán un Ayuntamiento virtual sobre la sequía el miércoles 15 de septiembre a las 5:30 p.m. El Ayuntamiento se llevará a cabo utilizando un seminario web Zoom. El enfoque de la reunión estará en la sequía y los impactos en el Segundo Distrito de Supervisión y la cuenca del río Ruso.

  • Sonoma Water
    Published on September 10, 2021

    Sonoma County Water Agency and Second District Supervisor David Rabbitt will host a virtual Drought Town Hall on Wednesday, September 15 at 5:30 p.m.  The Town Hall will be held utilizing a Zoom webinar.  The focus of the meeting will be on the drought and impacts to the Second Supervisorial District and Russian River watershed.  

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Current Water Supply Levels

View current water supply levels in Lake Sonoma and Lake Mendocino as well as current Russian River flows.

Water Supply

Sonoma County Water Agency provides high quality drinking water to over 600,000 people in Sonoma and northern Marin Counties.

Flood Protection

The Sonoma County Water agency is responsible for maintaining over 75 miles of streams throughout Sonoma County, and has numerous facilities to help reduce the risk of flooding.


The Sonoma County Water Agency manages and operates eight different sanitation districts and zones throughout Sonoma County. High-quality tertiary treated recycled water is an important source of water and its use offsets potable water demands.

Contact Information

Contact us by Phone
404 Aviation Boulevard
Santa Rosa, CA 95403
38.51193, -122.7835

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