Central Marin Sanitation Agency


For more details, please click here to download our 
Facility Tour Package.
Call 415-459-1455 to schedule your visit.

Individual and group public tours of CMSA facilities are available upon request. Tours are ADA compliant, and offer a firsthand look at how wastewater is treated, recycled and safely discharged into the bay environment.

Students from Dominican University take a tour of the Organic Waste Receiving Facility.



Students view the treated water as it courses through the Chlorine Contact Tanks.


Students are led through the underground gallery to see the extensive pipe network, and view the microorganisms (activated sludge) that treat the water.