USGS Water-Year Summary for Site 0219897945

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Max.,Min.,Med.)
	00480 Salinity(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Min.,Max.,Med.)

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

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USGS Water-Year Summary 2023

0219897945 BACK RIVER 0.4 MILES DOWNSTREAM US 17, NEAR SAVANNAH, GA

LOCATION - Lat 32°05'52", long 81°04'58" referenced to North American Datum of 1983, Chatham County, GA, Hydrologic Unit 03060109,

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: November 2013 to current year.

pH: November 2013 to current year.

WATER TEMPERATURE: November 2013 to current year.

DISSOLVED OXYGEN: November 2013 to current year.

TURBIDITY: November 2013 to current year.

SALINITY: November 2013 to current year.

PHYCOERYTHRIN: March 2019 to December 2019 and March 2020 to November 2020.

COOPERATION - U.S. Army Corps of Engineers, Savannah District.

INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor.

REMARKS -
For period: 10/01/2014-10/31/2017: Specific Conductance, pH, and Water Temperature rated good. Dissolved Oxygen rated fair, except when concentrations fell below 4.0 mg/L, which are rated poor. Turbidity rated poor.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 35,700 microsiemens, September 11, 2017; minimum recorded, 61 microsiemens, February 27, 2020.

pH: Maximum recorded, 8.0 units, January 14 & 15, 2023; minimum recorded, 6.2 standard units; December 30, 2019

WATER TEMPERATURE: Maximum recorded, 32.3°C, August 11, 2019; minimum recorded, 3.9°C; January 5-7, 2018

DISSOLVED OXYGEN: Maximum recorded, 11.7 mg; January 06, 2018; minimum recorded, 1.2 mg/L; August 12, 2018, and July 4, 2019

TURBIDITY: Maximum recorded, 981 FNU; October 26, 2019; minimum recorded, 0.9 FNU, May 7, 2014.

SALINITY: Maximum recorded Salinity: 22.5 parts-per-thousand; September 11, 2017; Minimum recorded Salinity: <0.04 parts per thousand; multiple occurrences during the period of record

PHYCOERYTHRIN: Maximum recorded, 32.9 RFU; April 02, 2019. Minimum recorded, 1.20 RFU; July 05, 2019