Invasive Golden Mussels Found in Alameda County's Lake Del Valle Prompt 30-Day Boat Quarantine
The district said boats without an East Bay Park District band will be inspected for golden, quagga and zebra mussels at multiple reservoirs.
- On Monday, the East Bay Regional Park District ordered an immediate 30-day quarantine for all watercraft launching at Lake Del Valle after detecting invasive golden mussels in the reservoir near Livermore.
- First identified in North America at the Port of Stockton in 2024, the invasive species spreads rapidly by attaching to boats and gear, threatening local water infrastructure, native fish, and water quality.
- Before the discovery at Lake Del Valle, Contra Loma Reservoir in Antioch was the only other East Bay Regional Park District waterbody where golden mussels were detected, and boaters there face identical quarantine rules.
- Boats launching exclusively at Lake Del Valle with an intact district boat band avoid the quarantine, but all other watercraft face a 30-day restriction before visiting other District-managed waterbodies.
- The California Department of Fish and Wildlife emphasizes a "Clean, Drain, Dry" campaign to limit spread, while mandatory inspections for all watercraft include fees of $5 to $10 to support the program.
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Danville San Ramon
Golden mussels detected at Lake Del Valle in Livermore; boating restrictions put in place
EBRPD has enacted a 30-day quarantine for boats that launch at Lake Del Valle after highly invasive golden mussels were detected in the reservoir in Livermore, the agency announced Monday.
Invasive golden mussels found in Alameda County's Lake Del Valle prompt 30-day boat quarantine
A species of highly invasive mussel have been found at Alameda County's Lake Del Valle and it prompting authorities to issue a quarantine on boats that launch at the lake.
Lake Del Valle imposes boat quarantine after golden mussels found at recreation area
Invasive golden mussels have been recently found at Lake Del Valle near Livermore, prompting park officials to enforce a 30-day quarantine on watercraft there. The 5-mile-long lake at Del Valle Regional Park is part of the East Bay Regional Park District. Until this week, Contra Loma Reservoir in Antioch was the only waterbody in the […]
Golden Mussels Detected at Del Valle
Golden Mussels Detected at Del Valle Quarantine rules in effect for East Bay Regional Park District waterbodies kstrey Mon, 09/21/2026 - 13:45 OAKLAND, Calif. — The East Bay Regional Park District is notifying the public that highly invasive golden mussels have been detected in Lake Del Valle at Del Valle Regional Park in Livermore. Effective immediately, boaters who launch at Lake Del Valle will be subject to a 30-day quarantine before their …
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