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Contact Us

Regular Business Hours

Monday - Friday
9:00AM - 5:00PM


Postal Mail

P.O. Box 227
Tiburon, CA 94920

Administrative Office

2001 Paradise Drive
Tiburon, CA 94920


(415) 435-1501


(415) 435-0221

Driving Directions

By Google Maps

Sewer Smart

Sewer Smart

Contact Us

District Office
PO Box 227
2001 Paradise Drive
Tiburon, CA 94920

Tel (415) 435-1501
Fax (415) 435-0221

Sewer Emergencies

24 hours (415) 945-4080

Dial 9-1-1 if public health or property is threatened.

About Sanitary District No. 5

Sanitary District No.5 of Marin County provides collection and treatment of wastewater to parts of the Tiburon Peninsula and the City of Belvedere. The District serves over 3,500 households, collecting, processing, and treating wastewater in accordance with State and Federal Regulations under a National Pollution Discharge Elimination System Permit.