General Information

Event name: US-17-007
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Other ( Intense smell)
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (NC Div. Water Resources Ambient Monitoring)
Event occurred before in this location: Yes (Summer 2015/2016)
Individuals to contact: Fensin, Elizabeth

Location & Date

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Location: Latitude: 36.209722, Longitude: -76.726667
General location information: Ablemarle Sound/Chowan River,
HAB Area code(s): US-11
Additional location information: Low salinity estuary (0.04-.97 ppt)
Bloom event dates (yyyy/mm/dd): Start: 2017-06-12, End: 2017-08-12
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Decaying, stinking surface blooms 6/22-8/2


Causative organism known: Yes
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 320 ug/L µg/l
Additional bloom information: No financial estimate yet, but residents did not like having to miss water recreation; city council worried about tourism impacts.
Event-related bibliography:

Environmental Conditions

Weather: Partly cloudy, humid Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): 10.9 mg/L Wind velocity:
Temperature (°C): 27.8 Oxygen saturation %: 137.6 Current Direction:
Sechhi disk (m): .4 Salinity: .04 Current Velocity:
Nutrient information: PHOSPHATE: .15 mg/L
Temperature Range During Event: Max: 35.6 °C, Min: 27.4 °C
Salinity Range During Event: Max: .86, Min: .04
Bloom location in the water column: Whole column
Growth Comments Cell counts highest on 6/22/17
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 05:52 on 23 Apr 2018