General Information

Event name: US-16-010
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: Maximum levels of PSP toxin: 104-2535g. Maximum levels of DSP toxin: 21-242g.)
Associated syndrome: DSP , PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): PSP toxin: Blue mussels, butter calms, geoduck clams. DSP toxin: Blue mussels.
Report the outcome of a monitoring programme: Yes (Marine Biotoxin Program at the Washington State Department of Health, Office of Environmental and Health and Safety.)
Event occurred before in this location: Yes (PSP closures have occurred throughout Central Puget Sound previously. The first DSP closure in Central Puget Sound was in 2012.)
Individuals to contact: BORCHERT, Jerry

Location & Date

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Location: Latitude: , Longitude:
General location information: Washington State, Central Puget Sound, Pacific Northwest
HAB Area code(s): US-24
Additional location information: PSP closures occurred between 5/17/16-10/25/16. DSP closures occurred between 6/9/16-12/21/16.
Bloom event dates (yyyy/mm/dd): Start: 2016-05-17, End: 2016-12-21
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella ( cells/L)
Dinophysis sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Butter Clams Saxitoxins 165g Bioassay-Mouse
Blue Mussels Saxitoxins 2535g Bioassay-Mouse
Geoduck Clams Saxitoxins 197g Bioassay-Mouse
blue mussels Okadaic Acid 242g LC-MS
Kit used: No Type of kit used:
Additional information:
Economic losses: Recreational and commercial shellfish harvest seasons were interrupted, causing an economic loss to the Central Puget Sound Washington communities.
Management decision: WADOH closed shellfish harvesting at impacted areas to protect public health.
Additional harmful effect information:
Created at 10:36 on 27 Feb 2017