California county declares emergency over ‘out of control’ invasive species

The Brief

  • San Joaquin County has declared a local state of emergency to combat an infestation of invasive golden mussels that have spread rapidly across the Delta since their 2024 discovery.
  • The infestation threatens critical infrastructure, already fouling a $100 million floodgate and irrigation equipment, while posing a severe risk to the region’s $3 billion agricultural industry.
  • Emergency measures prioritize funding and mitigation, including a proposal for $7.5 million to build five decontamination stations and a streamlined permitting process for faster boat inspections.

SAN JOAQUIN COUNTY, Calif. San Joaquin County supervisors took unanimous action Tuesday to address a “local emergency” caused by the rapid proliferation of golden mussels in the Delta.

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