On Tuesday, June 16, the Sacramento County Board of Supervisors proclaimed a local emergency in response to the growing threat posed by the invasive Golden Mussel. Photo courtesy of Sacramento County

SACRAMENTO COUNTY, CA (MPG) - On Tuesday, June 16, the Sacramento County Board of Supervisors proclaimed a local emergency in response to the growing threat posed by the invasive Golden Mussel. These freshwater species have rapidly spread throughout California waterways and threaten regional water infrastructure, the environment and the local economy. This proclamation allows the County to work more closely with regional, state and federal partners to address the threat posed by the Golden Mussel and help safeguard vital water resources.

The Golden Mussel (Limnoperna fortunei) was first detected in North America in October 2024. Native to Asia, Golden Mussels are highly invasive and reproduce quickly, forming dense colonies on hard surfaces. They can spread through waterways, on boats and on water equipment, making containment difficult once established. Large clusters of the mussels can clog pipes, pumps and conveyance systems. Golden Mussels can also damage infrastructure and disrupt aquatic ecosystems by competing with native species.

Sacramento County joins a growing number of jurisdictions throughout California that have taken action to address the threat. Neighboring San Joaquin County also proclaimed an emergency this year. Kern County also recently declared an emergency due to the presence of golden mussels.

Sacramento County relies on an extensive network of waterways and water infrastructure to support residents, businesses and agriculture. The County will continue working with water agencies, environmental partners and state officials to monitor the species and support efforts to prevent further spread.

You can help prevent the spread of invasive mussels by cleaning off tubes, kayaks, canoes and other watercraft between uses. Visit the Stop Aquatic Hitchhikers website to find out how to correctly clean your watercraft to help prevent the spread of all invasive species.  If you believe you have sighted golden mussels, you can report it to [email protected].