LOCATION.--Lat 40°54'12.8", long 73°32'36.1" referenced to North American Datum of 1983, Nassau County, NY, Hydrologic Unit 02030201, located in West Harbor Memorial Park.
PERIOD OF RECORD¹.--July 2023 to current year.
PERIOD OF DAILY RECORD¹.--WATER TEMPERATURE: July 2023 to current year. 
SPECIFIC CONDUCTANCE: July 2023 to current year. 
SALINITY: July 2023 to current year. 
pH: July 2023 to current year. 
DISSOLVED OXYGEN: July 2023 to current year. 
TURBIDITY: July 2023 to current year. 
CHLOROPHYLL: July 2023 to current year.
PHYCOERYTHRIN: July 2023 to current year.

INSTRUMENTATION¹.--A continuous water-quality monitor with water temperature, specific conductance, pH, dissolved oxygen, chlorophyll fluorescence, and phycocyanin fluorescence provides 6-minute-interval readings. Salinity record computed from specific-conductance readings.
EXTREMES FOR PERIOD OF DAILY RECORD¹.--WATER TEMPERATURE: Maximum, 29.6°C, July 17, 2023; minimum, 4.9°C Dec. 15, 2023.
SALINITY: Maximum, 26.0, Aug. 9, 10, 11, 2023; minimum, 19.8 psu, Sept. 30, 2023.
pH: Maximum, 8.3, on several days in Nov. 2023; minimum, 7.1, Aug. 5, 2023.
DISSOLVED OXYGEN: Maximum, 12.7 mg/L, Oct. 25, Nov. 16, 2023; minimum, 2.6 mg/L Aug. 24, 2023. 
TURBIDITY: Maximum, 69.1 FNU, Aug. 13, 2023; minimum, 1.1 FNU, Oct. 10, 2023.

¹ Water-Quality Records

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