LOCATION.--Lat 40°45'52.7", long
74°00'11.5" referenced to North American Datum of
1983, New York County, NY, Hydrologic Unit 02030101, on left
bank at Hudson River Park on Pier 84, 4.0 mi upstream of mouth,
6.6 mi downstream of George Washington Bridge on US Highway 95,
and 8.9 mi downstream of Harlem River in New York, New
York.
PERIOD OF DAILY RECORD1.--WATER TEMPERATURE:
May 2019 to current year.
SPECIFIC CONDUCTANCE: July 2019 to current year.
SALINITY: July 2019 to current year.
pH: May 2019 to current year.
DISSOLVED OXYGEN: May 2019 to current year.
TURBIDITY: May 2019 to current year.
INSTRUMENTATION1.--A multi-parameter
water-quality sonde measures water temperature, specific
conductance, pH, dissolved oxygen, and turbidity at 15-minute
intervals since May 2019. Salinity record computed from
specific-conductance readings.
COOPERATION1.--Maintained by the Hudson River
Environmental Conditions Observing System in cooperation with
the Hudson River Park Trust.
EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER
TEMPERATURE: Maximum, 28.4 °C, Aug. 12, 2020; minimum, 0.2 °C,
Feb. 21, 2021, Feb. 5, 6, 9, 2022.
SPECIFIC CONDUCTANCE: Maximum, 46,100 uS/cm @ 25 °C, Dec. 23,
2022; minimum, 721 uS/cm @ 25 °C, Dec. 20, 2023.
SALINITY: Maximum, 29.9 psu, Dec. 23, 2022; minimum, 0.4 psu,
Dec. 20, 2023.
pH: Maximum, 8.5, June 10, 2022; minimum, 7.2, Aug. 22,
2019.
DISSOLVED OXYGEN: Maximum, 13.7 mg/L, Aug. 12, 2020; minimum,
3.7 mg/L, Aug. 26, 2020.
TURBIDITY: Maximum, 344 FNU, July 18, 2022; minimum, 0.9 FNU,
Sept. 13, 2020, Oct. 18, 19, 2022.
1 Water-Quality Records
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