Marin Sonoma WMA


Chair: Chris Cook, Marin County Department of Agriculture, Weights and Measures

Secretary: Kat Knecht, Marin County Parks,

General contact: Stefan Parnay or Chris Cook at (415) 473-6700 or by email at and


The Marin/Sonoma Weed Management Area group includes representatives from federal, state, county and city agencies, private industry, and landowners. MSWMA’s goals include improving the effectiveness of local weed management efforts, increasing public awareness of invasive weeds, advancing responsible land stewardship practices, and working collaboratively with partner organizations by sharing resources and knowledge to manage and/or eradicate invasive weed populations. The group effort focuses onto the counties of Marin and Sonoma however the WMA collaborates on a regional level as well through the Bay Area Early Detection Network (BAEDN).


Physical meetings are currently not being held due to the COVID-19 pandemic. Our next scheduled online meeting is slated for November 16th at 10:00 AM. The meeting will be conducted online. If you are interested in attending our next online meeting please contact Chris Cook or Stefan Parnay at the contacts listed above.


For more information visit

Useful Links and Information:

Local Volunteering Opportunities:

If you are interested in participating in events aimed at the control of invasive plants in the local area please visit any of the following websites  to find more information about upcoming events.


Organizations on WMA’s MOU (intend to update MOU by 2021)