USGS Water-Year Summary for Site 021989793

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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(Med.,Min.,Max.)

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

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USGS Water-Year Summary 2024

021989793 LITTLE BACK RIVER AT HOG ISLAND, NEAR SAVANNAH, GA

LOCATION - Lat 32°08'12", long 81°07'19" referenced to North American Datum of 1983, Chatham County, GA, Hydrologic Unit 03060109,

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: August 2013 to current year.

pH: August 2013 to current year.

WATER TEMPERATURE: August 2013 to current year.

DISSOLVED OXYGEN: August 2013 to current year.

TURBIDITY: August 2013 to current year.

SALINITY: August 2013 to current year.

PHYCOERYTHRIN: March 2019 to December 2019

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

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

REMARKS -

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 25,000 microsiemens, September 11, 2017; minimum recorded, 56 microsiemens, March 06, 2020.

pH: Maximum recorded, 8.0 standard units; April 27, 2019; minimum recorded, 6.1 units, June 3-5, and 8, 2016.

WATER TEMPERATURE: Maximum recorded, 31.9°C, July 12, 2016 and August 16, 2016; minimum recorded, 3.2°C, January 5, 2018.

DISSOLVED OXYGEN: Maximum recorded, 11.9 mg/L, April 08, 2018; minimum recorded, 1.3 mg/L; August 04, 2019.

TURBIDITY: Maximum recorded, 323 FNU, May 25, 2017; minimum recorded, 4.2 FNU, May 11 & 13, 2022.

SALINITY: Maximum Salinity Recorded, 15.2 parts-per-thousand; September 11, 2017; Minimum Salinity: <0.04 parts-per-thousand; many days during the period of record.

PHYCOERYTHRIN: Maximum Recorded, 125 RFU; April 25, 2019. Minimum Recorded, 1.7 RFU; June 08 and 09, 2019