General Information

Event name: US-20-014
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Virginia Harmful Algal Bloom Taskforce)
Event occurred before in this location: Yes (recurring fall blooms in lower York River and lower Chesapeake Bay/Hampton Roads since 2007. No prior history of fishkill in this location)
Individuals to contact: EGERTON, Todd

Location & Date

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Location: Latitude: , Longitude:
General location information: Hampton, Virginia
HAB Area code(s): US-10
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 2020-09-01, End: 2020-09-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium monilatum (5,285,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Fishkill and bloom picked up in 9/15/20 news story: Harmful, biolumiscent algae bloom causes fish kill in Indian Creek in Hampton (WAVY 10 and others)
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
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: No closures
Additional harmful effect information:
Created at 12:09 on 20 Apr 2021