About US

California’s Oldest District

Established on May 27, 1899 – Ross Valley Sanitary District is believed to be California’s oldest sanitary district. Read our history.

Service Area

Fairfax, San Anselmo, Ross, Larkspur, Bon Air, Sleepy Hollow, Kentfield, Kent Woodlands, Oak Manor and Greenbrae.

Service Scope

The District operates and maintains approximately 200 miles of collection sewer lines and 19 pumping stations which collect, pump, and transport approximately four million gallons of wastewater per day to Central Marin Sanitation Agency for treatment. Approximately 60% of the District’s collection system was installed prior to 1955.

Mission Statement

The District’s mission is to provide our customers with high quality wastewater collection service, through a system that has no avoidable sanitary sewer overflows, at the lowest sustainable cost, in order to protect public health and the environment. Our Mission.


2960 Kerner Boulevard, San Rafael, CA 94901. (map)


The District’s 30+ member staff includes a General Manager, administrative/accounting personnel, field inspectors, and pump and line crew employees. Our key staff members.

Organizational Structure

Ross Valley Sanitary District (also known as Sanitary District No. 1) is a special enterprise district organized under the California Health and Safety Code and the Sanitary Acts of 1891 and 1923. The District is governed by a five-member Board of Directors elected at large. Election of Directors is consolidated with the June Primary Election, with three and two Directors being elected in alternating, even numbered years. Directors are elected to serve four year terms. The District Board routinely meets each month, with special meetings called as necessary. Daily management is carried out by the General Manager who oversees the District’s staff and reports directly to the board. View our Board of Directors page for more information.

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