There are currently no Quagga or zebra mussels in North Coast waterways, including Lake Sonoma, Lake Mendocino and Ruth Lake. Let’s keep it that way!

If brought into a local waterway, a thumbnail-sized mussel called quagga and zebra mussels could force the closure of popular boating recreational waterways. This website is dedicated to educating our community about the threat the mussels pose to recreational opportunities, our environment and economy.

Immediately report a mussel sighting – please call
1-877-STOP-ANS (1-877-786-7267).


North Coast Consortium


North Coast communities and local governments are working together to prevent the spread of invasive quagga and zebra mussels into our waterways.

Mussel Infestation Map


There are currently no quagga or zebra mussels in North Coast waterways. View map of the California waterways quagga and zebra mussels have infested so far.

Boat Inspection


Mussels can colonize on hulls, engines, and steering components of boats. Learn how to inspect your watercraft before entering a waterway.