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Posted on: October 13, 2020

Shellfish Biotoxin Advisory Continues

October 13, 2020
For Immediate Release
Contact: Michael Dawson, Water Quality Manager
Jefferson County Public Health
360-385-9444 x301

The marine biotoxin that causes Paralytic Shellfish Poisoning (PSP) has persisted in Jefferson County and much of Puget Sound, for longer than is typical. In Jefferson County, the following waterbodies are still under a biotoxin advisory for the recreational harvest of all species of clams, oysters and mussels:

  • Discovery Bay
  • Strait of Juan de Fuca
  • Admiralty Inlet
  • Port Townsend Bay
  • Kilisut Harbor
  • Mystery Bay
  • Oak Bay
  • Mats Mats Bay
  • Port Ludlow
  • Bywater Bay
  • Northern Hood Canal
  • Squamish Harbor
  • Dabob Bay
  • Quilcene Bay


Public access points are posted with warning signs. On the Shellfish Safety map at www.doh.wa.gov/ShellfishSafety.htm the waterbodies are marked with red cross-hatching, and the beaches are outlined in red, meaning “Closed by Biotoxins.”

DOH Shellfish Safety Map ScreenshotShellfish testing continues, and sample results have been as high as 2-3 times greater than the action level of 80 micrograms per 100 grams of shellfish. As soon as toxins decline, the shellfish safety map will be updated by Washington State Department of Health and signs will be removed from public beaches. For more information about PSP, see https://www.doh.wa.gov/CommunityandEnvironment/Shellfish/RecreationalShellfish/Illnesses/Biotoxins/ParalyticShellfishPoison. For questions about the status of Jefferson County beaches, see https://www.jeffersoncountypublichealth.org/735/Shellfish-Monitoring or call 360-385-9444. Recreational harvesters should also check Fish and Wildlife regulations and seasons at wdfw.wa.gov/fishing/shellfish or the Shellfish Rule Change Hotline 1-866-880-5431.

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Jefferson County Public Health
Always Working for a Safer and Healthier Community

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