The Tomales Bay Watershed Council (TBWC) was formed in 1999 by the region’s stakeholders with an interest in improving the watershed’s vital natural resources.  The TBWC includes representatives from local, state and federal agencies, environmental organizations, citizen and residential groups, agricultural and shellfish industries, recreational interests and individual residents. Learn more about who we are.


Operating as a consensus based organization, the TBWC provides a forum to advance watershed restoration and implement strategies to improve quality of life. Learn more about our Stewardship.


Beach Monitoring Season

Each year, from April 1-October 31, the Marin County  Environmental Health Services (EHS) performs weekly monitoring of bacteria levels at selected recreational use sites in the Tomales Bay watershed.  We are committed to providing the public current advisory conditions for each of the monitored sites on our Beach Water Quality page.


Check weekly for the latest advisory conditions.  Support the Council's ongoing efforts to bring you this service with a donation!


Horsekeeper's Workshop for Clean Water - The TBWC joined with the Marin Horse Council on April 26th for a one-day workshop on new horse facility regulations, best management practices for rain, mud and manure, and resources available to help.  Presentations and resources available on the workshop webpage.


State of Tomales Bay Conference

The TBWC hosts the State of Tomales Bay Conference to share the latest understandings of science, policy and practice in the watershed.  Proceedings from all Seven State of Tomales Bay Conferences are available on the conference page.


Local Support for Local Stewardship

The Council is proud of the local stewards who support our long-term water quality monitoring program in the Tomales Bay watershed.


Our thanks to MMWD and  Hog Island Oyster Co. for their continued support of the Council's water quality monitoring.  Their ongoing stewardship supports a healthy Bay!


See the Adopt Our Watershed page for more information about how you can help!



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