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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
01190070 CONNECTICUT RIVER AT HARTFORD, CT
LOCATION - Lat 41°46'08.74", long 72°40'03.18" referenced to North American Datum of 1983, Hartford County, CT, Hydrologic Unit 01080205, at Bulkeley Memorial Bridge on U.S. Interstate 84, at Hartford, 1.5 mi downstream from Podunk River and 1.2 mi upstream from Hockanum River.
DRAINAGE AREA - 10,487 mi².
REVISIONS HISTORY - WDR CT-83-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - January 1905 to current year.
GAGE - Water-stage recorder. Datum of gage is -0.85 ft above North American Vertical Datum of 1988 (0 ft above National Geodetic Vertical Datum of 1929). Satellite telemetry at station.
REMARKS - Records prior to 1973 available at the River Forecast Center, NOAA, Taunton Mass. Tidal effect at times of high freshwater inflow is eliminated. Stage data in feet at 15-minute intervals available upon request.
Water Year 2014: Maximum discharge, 95,100 ft³/s, Apr. 18, elevation 20.05 ft.; minimum tidal elevation, 0.34 ft., Nov. 25.
Water Year 2015: Maximum discharge, 74,500 ft³/s, Apr. 16 and 17, elevation 17.08 ft.; minimum tidal elevation, 0.60 ft., Sep. 8.
Water Year 2016: Maximum discharge, 89,200 ft³/s, February 27, elevation 19.21 ft.; minimum tidal elevation, 0.12 ft., Sep. 15.
Water Year 2017: Maximum discharge, 77,400 ft³/s, April 9, elevation 17.16 ft.; minimum tidal elevation, 0.09 ft., Nov. 12.
Extremes for subsequent water years can be found in the Stream-flow: Peak streamflow page
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 313,000 ft³/s, Mar. 20, 1936; maximum elevation, 37.05 ft, Mar. 21, 1936; minimum tidal elevation (1973-current year), -0.91 ft, Aug. 12, 1974.
WATER-QUALITY RECORDS
PERIOD OF RECORD - September 1976 to September 2010.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: May 2002 to November 2003.
pH: May 2002 to November 2003.
WATER TEMPERATURES: May 2002 to November 2003.
DISSOLVED OXYGEN: May 2002 to November 2003.
INSTRUMENTATION - Water-quality monitor May 2002 to November 2003.
REMARKS - Stream tidal affected. Limited daily value data for water year 2004 available upon request.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum, 204 microsiemens July 12, 2003; minimum, 89 microsiemens September 29, 2003.
pH: Maximum, 8.4 units July 8, 2003; minimum, 6.7 units September 29, 2003.
WATER TEMPERATURES: Maximum, 33.0°C July 12, 1970; minimum, °C on many days during winter periods.
DISSOLVED OXYGEN: Maximum,13.4 mg/L November 6, 2002; minimum 5.1 mg/L June 13, 2003.
