Formed in 1950, the Sausalito-Marin City Sanitary District provides sewage collection, treatment and disposal to Sausalito and the unincorporated area of Marin City, as well as to Fort Baker and the Tamalpias Community Services District.

History -

The past 50 years, we've come a long way!

The original facility consisted of a primary treatment plant and a system of pump stations and lines.

Around 1974 a sludge dewatering facility was added.

In 1987, a major upgrade occurred. Secondary treatment was added with fixed film reactors on top of new secondary sedimentation tanks. Two contact tanks were added which dramatically improved the plants chlorination/dechlorination process. A sludge thickener and secondary digester were added to better manage the flow of solids. These changes improved the plants capacity while meeting stricter discharge regulations.

In 1992, the addition of four sand filters was instrumental in reducing the Parts Per Million counts in our discharge water. Since that time, several smaller efficiency and upgrade changes have occurred, including upgrading electrical equipment and pump stations. Process efficiencies have been added to existing facilities based on advances in technology, like the new mixing system that is being added to the primary digester.

Please visit our New Construction page to see the exciting changes that are happening right now!