USGS Water-Year Summary for Site 021720710

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	Available Parameters
	00010 Temperature, water(Min.,Mean,Max.)
	00065 Gage height(Max.,Min.,Mean)
	00095 Specific cond at 25C(Min.,Mean,Max.)
	00095 Specific cond at 25C(Max.,Min.,Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

021720710 COOPER R AT CUSTOMS HOUSE AUX AT CHARLESTON, SC

LOCATION - Lat 32°46'49", long 79°55'26" referenced to North American Datum of 1927, Charleston County, SC, Hydrologic Unit 03050201, at South Carolina Ports Authority dock, 0.25 mi east of Customs House, and at mile 0.6.

REVISIONS HISTORY -

Specific conductance records for the bottom location for the period of December 01, 2016, to May 09, 2017, were revised on February 28, 2018. There were issues with the corrections that had been applied and the data was inadvertently set to "Approved" before the data had been reviewed.

The station name was changed on Aug. 31, 2023, which was originally COOPER RIV AT CUSTOMS HOUSE (AUX) AT CHARLESTON, SC.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1987 to current year.

GAGE - Data collection platform. Datum of gage is 18.10 ft below NAVD of 1988.

EXTREMES FOR PERIOD OF RECORD - Maximum gage height 24.76 ft, Sept. 11, 2017; minimum gage height, 10.89 ft, Mar. 13, 1993.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1987 to current year.

PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE (TOP): October 1986 to current year.
SPECIFIC CONDUCTANCE (BOTTOM): October 1986 to current year.
WATER TEMPERATURE (TOP): March 1993 to current year.
WATER TEMPERATURE (BOTTOM): March 1993 to September 1994 (discontinued).
DISSOLVED OXYGEN (TOP): March 1993 to September 1995 (discontinued).
DISSOLVED OXYGEN (BOTTOM): March 1993 to September 1994 (discontinued).

INSTRUMENTATION - Water-quality multiprobe and data collection platform.

REMARKS -
For the 2014 water year, specific conductance (TOP) records rated good except for Oct. 1-9, which are poor. For the 2014 water year, specific conductance (BOTTOM) records rated good. For the 2014 water year, temperature records rated good. For the 2015 water year, specific conductance (TOP) records rated good except for Apr. 8 - May 6, which are rated poor. For the 2015 water year, specific conductance (BOTTOM) records rated good except for Apr. 9 - May 6 and Jul. 22 - Aug. 14, which are rated poor. For the 2015 water year, temperature records rated good. For the 2016 water year, specific conductance (TOP) records rated good except for May 4 - Jun. 6, which are rated poor. For the 2016 water year, specific conductance (BOTTOM) records rated good except for Jun. 21 - Jul. 12, which are rated fair; May 4 - Jun. 6 and Jul. 13 - Aug. 17, which are rated poor. For the 2016 water year, temperature records rated excellent except for Aug.19 - Sept.20, which are rated good.

EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE (TOP): Maximum, 57,600 microsiemens, Nov. 6, 2001; minimum, 6,520 microsiemens, Sep. 6, 1987.
SPECIFIC CONDUCTANCE (BOTTOM): Maximum, 64,300 microsiemens, May 5, 1989; minimum, 11,400 microsiemens, Sep. 7, 1987.
WATER TEMPERATURE (TOP): Maximum, 32.0°C, Aug. 1, 1993, Aug. 1, 1999; minimum, 5.0°C, Jan. 8, 2018.
WATER TEMPERATURE (BOTTOM): Maximum, 32°C, July 19, 2020; minimum, 5.5°C, Jan. 22, 23, 1994.
DISSOLVED OXYGEN (TOP): Maximum, 15.3 mg/L, Feb. 10, 1994; minimum, 3.6 mg/L, June 15, 1993.
DISSOLVED OXYGEN (BOTTOM): Maximum, 13.3 mg/L, Jan. 26, 1994; minimum, 4.0 mg/L, July 22, Aug. 12, 1994.