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525 San Anselmo Avenue
San Anselmo, CA 94960
Ph: (415) 258-4600
Fx: (415) 459-2477
Creek Pollution (MCSTOPPP)
Report Creek Pollution

When reporting a creek problem, please have the following information:

Report A Problem
LOCATION:  Know the specific street address, or creek name and nearest cross street.
TIME:  When did you first notice the problem and is it still occurring?
ACTIVITY:  Have a description of the problem, any odors, changes in water color or debris.
POLLUTER:  Try to get a description of the person, license number and vehicle.

Occurrence Department Phone Number

During business hours
(8:00 am-4:30 pm)

Town of San Anselmo Public Works Department

(415) 258-4646

After-hours spills
and weekends

Town of San Anselmo Police Department

(415) 258-4610


Prevention Program

The Town of San Anselmo is a member of the Marin County Stormwater Pollution Prevention Program (MCSTOPPP) which works to comply with stormwater regulations to protect Marin's creeks and wetlands.

View the MCSTOPPP website for more information.

View the Erosion Control Measures for small construction projects.