USGS Water-Year Summary for Site 01193050

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	32295 fDOM, water, in situ(Mean,Min.,Max.)
	63680 Turbidity, Form Neph(Mean,Max.,Min.)
	72137 Discharge,tide fltrd(Mean)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

01193050 CONNECTICUT RIVER AT MIDDLE HADDAM, CT

LOCATION - Lat 41°32'30", long 72°33'13" referenced to North American Datum of 1927, Middlesex County, CT, Hydrologic Unit 01080205, on pier of United Technologies Corporation (formerly Connecticut Advanced Nuclear Engineering Laboratory, CANEL), 0.8 mi south of Middle Haddam, 7.6 mi upstream from Salmon River, and 6.1 mi south of Middletown.

DRAINAGE AREA - 10,897 mi².

REVISIONS HISTORY - WDR CT-83-1: Drainage area

SURFACE-WATER RECORDS

PERIOD OF RECORD - Discharge: Dec. 2008 to current year.

GAGE - Water-stage and velocity recorder. Satellite telemetry at station.

REMARKS -

Water Years 2017-2023: Records fair except for periods of estimated discharges, which are poor.

Water Years 2014- 2016: Records fair except for periods of estimated daily discharges, which are poor.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 2002 (discontinued). pH: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 2002 (discontinued). WATER TEMPERATURES: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 2002 (discontinued). DISSOLVED OXYGEN: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 1997, October 1998 to September 1999.

INSTRUMENTATION - Water-quality monitor October 1967 to September 2002 (discontinued). Re-established September 2010.

REMARKS - USGS water-quality monitoring system installed June 1978. Interruptions of the record due to malfunctions of the instrument. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records due to the depth and location of the probes used for the monitoring system. Stream tidal affected. Extremes for period of daily record and current year are only for those values reported. Limited daily value data for water year 2002 available upon request.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum, 483 microsiemens Aug. 18, 1975; minimum, 33 microsiemens March 23, 1980.

pH: Maximum, 9.7 units July 3, 1975; minimum, 4.9 units Apr. 23, 1976.

WATER TEMPERATURES: Maximum, 33.0°C July 12, 1970; minimum, -0.2°C on many days during winter periods.

DISSOLVED OXYGEN: Maximum, 19.2 mg/L Feb. 17, 1980; minimum 0.6 mg/L Aug. 11, 1970.

TURBIDITY (TOP): Maximum, 600 FNU, Aug. 31, 2011; minimum, 0.1 FNU on many days.

NO3+NO2: Maximum, 0.66 mg/L as N Feb. 01, 2022; minimum 0.01 mg/L as N Jun. 24, 2016.

fDOM: Maximum, 90.8 QSE Aug 30, 2011; minimum 11.8 QSE July, 2021.

BAROMETRIC PRESSURE: Maximum, 783 mmHg, Feb. 13, 2018; minimum, 729 mmHg, Feb. 7, 2020.