General Information

Event name: US-17-030
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: Maximum levels of PSP toxin: 81-1690g. Maximum levels of DSP toxin: 16-38g.)
Associated syndrome: DSP , PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): PSP toxin: Blue mussels, butter clams, geoduck clams, littleneck clams, manila clams, Pacific oysters. 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 , Coyne, Audrey

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Washington State, Central Puget Sound, Pacific Region
HAB Area code(s): US-24
Additional location information: PSP closures occurred between 7/18/17-2/5/18. DSP closures occurred between 8/21/17-11/27/17.
Bloom event dates (yyyy/mm/dd):
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
geoduck clam Saxitoxins 197 ug Bioassay-Mouse
butter clam Saxitoxins 165 ug Bioassay-Mouse
blue mussel Saxitoxins 2535 ug Bioassay-Mouse
blue mussel Okadaic Acid 242ug 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 08:30 on 24 Apr 2018
Updated at 08:55 on 24 Apr 2018