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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
410606073245700 NORWALK RIVER AT NORWALK AQUARIUM NR S NORWALK, CT
LOCATION - Lat 41°06'05.83", long 73°24'57.41" referenced to North American Datum of 1983, Fairfield County, CT, Hydrologic Unit 01100006,
DRAINAGE AREA - 62.2 square miles (StreamStats)
WATER-QUALITY RECORDS
PERIOD OF RECORD - Discrete sampling, June 2022 to current year.
PERIOD OF DAILY RECORD - In-situ monitoring of Water Temperature, Specific Conductance, Dissolved Oxygen, Turbidity FNU, Relative Chlorophyll RFU, June 2022 to current year.
INSTRUMENTATION - TOP and BOTTOM sublocation multiparameter sonde site monitors, June 2022 to current year. PAR underwater sensor June 2022 to July 2023.
EXTREMES FOR PERIOD OF DAILY RECORD -
--WATER TEMPERATURE: Maximum, 28.5°C, Aug. 03, 2024; minimum, -0.4°C Jan. 30, 2022.
--SPECIFIC CONDUCTANCE @25 °C: Maximum, 45100 µS/cm, Sept. 05, 2022; minimum, 196 µS/cm, Sept. 02, 2021.
--DISSOLVED OXYGEN: Maximum, 21.0 mg/l, Jul. 19, 2021; minimum, 0.1 mg/l, on multiple dates.
--TURBIDITY: Maximum, 131 FNU, Sept. 02, 2021; minimum, 0.11 FNU May. 19, 2023.
--CHLOROPHYLL: Maximum, 96.9 RFU, July. 27, 2022; minimum, 0.16 RFU, Dec. 14, 2014.
