CA County Declares Emergency Over Invasive Mussels

Sacramento County has issued a local emergency declaration to address the escalating threat of invasive golden mussels. This proactive measure aims to enhance coordination between Sacramento County and regional, state, and federal agencies in combating the rapid spread of the species, Limnoperna fortunei.

Officials are increasingly concerned as the golden mussel, originally from Asia, was first detected in North America in October 2024. Its ability to reproduce quickly and form dense colonies on infrastructure, such as pipes and water conveyance equipment, poses a serious risk to businesses and farms reliant on these systems.

The declaration by Sacramento County follows similar emergency actions taken by San Joaquin and Kern Counties, highlighting a growing alarm across jurisdictions. The invasive mussels present a multi-faceted threat to the environment, the local economy, and critical water-related systems essential for residents and agriculture.

To mitigate the spread, Sacramento County officials are prioritizing limiting further transport of the mussels. Residents are advised to wash all watercraft, including tubes, kayaks, and canoes, after use and can find detailed cleaning guidance on the Stop Aquatic Hitchhikers website. Reporting potential sightings to Invasives@wildlife.ca.gov is also encouraged.

Preventing the transport of these invasive mussels between waterways is significantly more effective and less costly than attempting eradication once established. Sacramento County is committed to ongoing collaboration with partners to monitor the threat and safeguard vital waterways and infrastructure.