Golden mussels are an invasive species spreading through California’s waterways, putting water infrastructure, water quality, agriculture, and local ecosystems at risk.
Assemblymember Rhodesia Ransom is working to help California respond faster, support water agencies on the ground, and protect the water systems families, farms, and communities rely on.
What Are Golden Mussels?
First detected in California in October 2024, golden mussels have spread through the Delta and along the State Water Project, reaching as far south as San Diego.
Golden mussels attach to water infrastructure in dense colonies, clogging pumps, pipelines, conveyance systems, and other critical water systems.
They can also harm water quality, alter lakes and rivers, and severely impact fisheries and aquatic ecosystems.
Unlike previous invasive mussels, golden mussels can survive in a wider range of environmental conditions, making them an even greater threat to California’s waterways.
How Assemblymember Ransom is Working to Address this Issue
The San Joaquin Delta is ground zero for the golden mussel infestation. San Joaquin County is already seeing the impacts of golden mussels on flood gates, water infrastructure, and boats.
As they continue to spread, water agencies face higher maintenance costs and more challenges protecting critical infrastructure.
Delta Decontamination Sites to Combat the Spread of Golden Mussels
Assemblymember Ransom introduced a budget request of $6 million one-time funding and an additional $1.5 million on ongoing funding in the 2026-2027 State Budget to fund five Delta-based decontamination control sites that will directly help prevent the spread of the invasive golden mussel.
The Golden Mussel Response Act
Assemblymember Ransom also authored AB 2032, the Golden Mussel Response Act, to help local water agencies respond quickly and effectively.
AB 2032 would streamline permitting processes and provide clearer guidance so water agencies can take timely action to prevent, mitigate, control, and eradicate golden mussels.
This effort would:
- Help local water agencies respond faster
- Allow simple maintenance work without unnecessary delays
- Support guidance for control plans and scientific research
- Improve coordination across state agencies
Stay Connected
Stay informed about efforts to respond to the Golden Mussel crisis and protect the San Joaquin Delta.
