Central Marin Sanitation Agency


For Information About
In-Class Presentations

For more information or to schedule a presentation at your school, call
Gretchen Mueller,
CMSA Public Education Program Coordinator
415-459-1455 ext. 141
or e-mail at

CMSA employees will come to your school and provide an informative presentation on wastewater treatment, pollution prevention, and protecting the environment from hazardous waste.

The format for the presentations consists of a short introduction by CMSA staff followed by the viewing of a 12-minute videotape. The tape is called 'Where Does It Go?' and features children storm drain stenciling and cleaning up creeks while learning the difference between the sanitary sewer system and the storm drain system. Next we break into small groups and alternate between several workstations. CMSA employees, teachers and volunteer parents facilitate each station. At the end, the group reassembles for a short question and answer period. The time frame for the presentation is roughly one hour.

The format can be shortened, lengthened or restructured based on the time available, the number of adult participants and the ages of the students. Our material is best suited for students in the 3rd to 5th grades. The workstations are described below.



Computer Games

Treatment Plant Model

Stormwater Diorama

We bring a microscope with a large viewing area and a small amount of our activated sludge. Students can view many of the living microorganisms that help us clean the wastewater. Worksheets are available for students to color while they wait for viewing opportunities. We bring a laptop computer with an interactive pollution prevention game for students to play. It is called Ecomasters and consists of four separate games, each of which can be played by several students at once. It is full of fun graphics and sounds that students can enjoy. Using beakers, non-hazardous chemicals and colored solutions CMSA employees demonstrate how a treatment plant cleans up the water before it is discharged into the Bay. We bring a tabletop model of a generic watershed. Using spray bottles and colored solutions, students are able to see the effects of stormwater runoff on watershed areas.