Sacramento County leaders consider emergency action on golden mussels

Sacramento County’s Board of Supervisors will consider declaring a local state of emergency this Tuesday to combat invasive golden mussels. According to Mary Jo Flynn-Nevins, chief of the county’s Office of Emergency Services, the species poses a serious and immediate threat to public infrastructure, economic stability, and environmental health in the Sacramento River and Delta.

Why are golden mussels a threat to Sacramento’s economy?

Golden mussels spread rapidly by attaching themselves to equipment and watercraft. According to an agenda item attributed to Flynn-Nevins, these mussels can clog pipes and critical public infrastructure.

The infestation also threatens environmental health by depriving fish of resources. Flynn-Nevins stated that as of late April 2026, the situation warrants a formal proclamation of emergency due to its potential scale and risk.

Did You Know? Golden mussels were first discovered in the Delta in October 2024.

What evidence shows the scale of the infestation?

The San Joaquin County Sheriff’s Office Boating and Dive Team recently provided visual evidence of the spread. The team posted photos of submerged vehicles that were completely encrusted with golden mussels after being pulled from the water.

Officials describe the threat to the Sacramento River and the Delta as “serious and imminent.” The ability of the species to spread quickly has driven the current urgency for county action.

Expert Insight: Samantha Carter notes that the transition from initial discovery in 2024 to an emergency declaration in 2026 highlights the aggressive nature of this species. The primary business risk lies in the potential for systemic infrastructure failure if pipe clogging remains unchecked.

What happens if the emergency proclamation is approved?

If the Board of Supervisors approves the proclamation, it will grant the county full authority and support to manage the crisis. A specific reporting structure would then be established.

Sacramento County leaders consider emergency action on invasive golden mussels

According to the agenda item, the director of emergency services would be required to return to the Board of Supervisors at least every 60 days. These updates would continue until the emergency is officially terminated.

Frequently Asked Questions

How do golden mussels spread through waterways?
They spread by attaching themselves to watercraft and other equipment.

What specific damage do these mussels cause?
According to county officials, they can clog pipes and infrastructure while also posing a threat to aquatic life and fish.

Who requested the local state of emergency?
The request is attributed to Mary Jo Flynn-Nevins, the chief of Sacramento County’s Office of Emergency Services.

Do you believe local emergency declarations are the most effective way to manage invasive species?