Water Quality Management

Marin County Environmental Health Services monitors ocean, bay and freshwater sites

Answer to questions about contaminated wells.

Our mission is to protect public health by issuing permits for public water systems

The Local Coastal Program is a planning document

Information regarding the protection and enhancement of water quality in creeks and wetlands

General information regarding Marin County watersheds

The official website for the Marin County Stormwater Pollution Prevention Program.

Provides information about less toxic alternatives to protect water quality.

Real-Time Rainfall, Creek Stage, and Weather Data

Online form for reporting of illicit discharge to stormdrain or creek

Ross Valley Flood Protection and Watershed Program

Marin County Stormwater Pollution Prevention Program.

Marin County Ocean and Bay Water Quality Testing Program.

Log in to request information about a water system.

Link to the CDA well construction application.

Application to obtain a permit to destroy a water, geothermal or monitoring well.