Established May 27, 1899, Ross Valley Sanitary District is the oldest sanitary district in Marin County and may be the oldest sanitary district in California. Its boundaries include 26.75 square miles of the Ross Valley water shed comprised of the towns of Fairfax, San Anselmo, and Ross; the City of Larkspur (including Bon Air); and the unincorporated areas known as Sleepy Hollow, Kentfield, Kent Woodlands, Oak Manor, and Greenbrae. Under contract, the District also serves the wastewater collection systems in Murray Park and San Quentin Prison. Read more...

Keep your environment clean and stay healthy! Zero spill tolerance for leaks and spills is essential because even small amounts of spilled wastewater is harmful to public health. Read more...

Need to install a new sewer line?
Find out about permits, fees and more...

Have questions about your sewer lines?
Read answers to frequently asked questions here...

 

As part of its 10-year, $67.8M Capital Improvement Program, the District recently approved a contract to design and bid the construction for over two miles of upgrades to sewer pipelines. The oldes...  Read more...

See a map of current sewer lines and construction sites here...