General Information

Event name: US-89-006
Nature of the harmful event:
Water Discoloration
Event directly affected:
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Chronic annual blooms.)
Individuals to contact: OLSEN, Paul

Location & Date

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Location: Latitude: , Longitude:
General location information: , New Jersey.
HAB Area code(s): US-09
Additional location information: Throughout Hudson/Raritan estuary into upper NY Bay, Bight area at least to Ambrose Light; NJ coast South to Manasquan Inlet.
Bloom event dates (yyyy/mm/dd): Start: 1989-06-20, End: 1989-07-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Most intense June 26-28; (bloom persisted for more than one week).


Causative organism known: Yes
Causative Species/Genus: Katodinium rotundatum (50,000,000 cells/L)
Eutreptia lanowii ( cells/L)
Cryptomonas sp. ( cells/L)
Gymnodinium sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 50 to 170 g/L Chl in estuary and adjacent c µg/l
Additional bloom information: Katodinium rotundatum in the estuary and briefly off northern Monmouth County
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event: Max: 24, Min: 18
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Water turbid. Slight water column stratification (in estuary 22,4 C on surface; 21,4 C on bottom)

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: NJDEP/USEPA Joint Surveillance. Intensive phytoplankton and dissolved oxygen survey of the area being conducted in response to fish kills which occurred last year; coastal monitoring ongoing. (USEPA/NJDEP joint surveys)
Additional harmful effect information: Amber or golden-colored water over an extensive area; most intense in the estuary and adjacent NJ coast; temporary localized hypoxia in Raritan/Sandy Hook Bay (as low as 3.0 mg/L on bottom); no significant fish kills reported (as occurred in this vicinity