Central Marin Sanitation Agency



CMSA provides wastewater treatment, disposal and related environmental services to protect public health and enhance environmental quality within its central Marin service area.


Business Hours:

8:00 am - 4:00 pm  Monday - Thursday
8:00 am - 3:00 pm  Friday

Contact Us:

1301 Andersen Drive
San Rafael, CA 94901

Phone: 415-459-1455

Alternate Phone: 415-459-8846
Fax: 415-459-3971

Driving Directions

For TRASH services please call
Marin Sanitary Service at 415-456-2601

For RECYCLING services please call
Marin Recycling at 415-453-1404


Click here to go on a virtual tour of the plant!


Come visit the Sav-R-Bay website, where you can find helpful, up-to-date information about protecting the environment through proper wastewater collection, treatment, and disposal.

Concerns About Water Pollution? To Report Spills, a Water Polluter or Odor Problems, Call 1-800-SAV-R-BAY (1-800-728-7229)



  • The next regular Board of Commissioners meeting is scheduled for Tuesday, April 14, 2015 at 6:00 p.m. at the Agency office.

  • Bioassay will be held April 6-10, 2015.


Click here to see what is OK to flush down the drain and what is not.


Click here to find out where you can take your unused pharmaceuticals for safe disposal.

Frequently Requested Agency Information

CMSA Is A Green Business

Take a look at our Green Business Annual Report, to see what we are doing to help Marin stay green.

The Agency recently conducted a Greenhouse Gas Inventory for 2012 as a baseline for current and future GHG reduction strategies.

Click here for more information

CMSA At Public Outreach Events

CMSA participates in various public education outreach events throughout the year. 


Click here for a full list of events

Do you have concerns about odors?

Odor Control Program & Reporting form

Please Call Us During Business Hours: Mon-Fri 415-459-1455
Request the Plant Manager

Non-Business Hours: 415-459-1455 ext 2
Request the On-Duty Operator