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USGS Current Water Data for Connecticut

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ICE EFFECTS ON STREAMFLOW - During winter, ice formation may cause stage and discharge values to appear higher than expected. Ice effects may be minor (occurring only at night and early morning) with baseline flows obvious, or the effects may be major (stage constantly increases over several days or weeks) resulting in greatly erroneous discharge. Streamgages experiencing minor ice conditions will continue to display stage and discharge values to enable users to estimate the approximate base-line stage and discharge. Streamgages experiencing major ice conditions will have the discharge record temporarily disabled to prevent use of erroneous discharge values. The discharge record will resume when it is determined that ice conditions are no longer present. Daily mean discharges during periods of ice effect will be estimated after detailed data analysis.

Daily Streamflow Conditions

Select a site to retrieve data and station information.
Stream gage levels in Connecticut, relative to 30 year average. 01205500: Flow=4490cfs,Stage=6.77ft,Floodstage=11ft,2023-02-09 02:30,76-90,HOUSATONIC RIVER AT STEVENSON, CT01196620: Flow=58.2cfs,Stage=1.60ft,2023-02-09 02:15,76-90,MILL RIVER NEAR HAMDEN, CT01184490: Flow=30.2cfs,Stage=0.90ft,2023-02-09 01:45,76-90,BROAD BROOK AT BROAD BROOK, CT01125500: Flow=777cfs,Stage=3.97ft,Floodstage=9.5ft,2023-02-09 02:30,76-90,QUINEBAUG RIVER AT PUTNAM, CT01124151: Flow=458cfs,Stage=2.19ft,2023-02-09 02:30,76-90,QUINEBAUG RIVER AT WEST THOMPSON, CT01123600: Flow=278cfs,Stage=4.47ft,2023-02-09 02:30,76-90,QUINEBAUG R BL WESTVILLE DAM NR SOUTHBRIDGE, MA01123360: Flow=171cfs,Stage=3.93ft,2023-02-09 02:30,76-90,QUINEBAUG R BL E BRIMFIELD DAM AT FISKDALE, MA01209700: Flow=60.5cfs,Stage=1.63ft,2023-02-09 02:30,25-75,NORWALK RIVER AT SOUTH WILTON, CT01209500: Flow=90.2cfs,Stage=3.76ft,2023-02-09 02:00,25-75,SAUGATUCK RIVER NEAR WESTPORT, CT01208990: Flow=44.8cfs,Stage=1.92ft,2023-02-09 02:00,25-75,SAUGATUCK RIVER NEAR REDDING, CT01208950: Flow=14.5cfs,Stage=1.51ft,2023-02-09 02:30,25-75,SASCO BROOK NEAR SOUTHPORT, CT01208925: Flow=28.4cfs,Stage=1.02ft,2023-02-09 02:15,25-75,MILL RIVER NEAR FAIRFIELD, CT01208873: Flow=11.2cfs,Stage=3.25ft,2023-02-09 02:50,25-75,ROOSTER RIVER AT FAIRFIELD, CT01208500: Flow=481cfs,Stage=2.66ft,Floodstage=12ft,2023-02-09 02:30,25-75,NAUGATUCK RIVER AT BEACON FALLS, CT01206900: Flow=142cfs,Stage=2.36ft,2023-02-09 02:45,25-75,NAUGATUCK RIVER AT THOMASTON, CT01204000: Flow=135cfs,Stage=3.51ft,Floodstage=9ft,2023-02-09 02:00,25-75,POMPERAUG RIVER AT SOUTHBURY, CT01203600: Flow=26.8cfs,Stage=1.75ft,2023-02-09 02:10,25-75,NONEWAUG RIVER AT MINORTOWN, CT01200500: Flow=1990cfs,Stage=3.94ft,Floodstage=8ft,2023-02-09 02:00,25-75,HOUSATONIC RIVER AT GAYLORDSVILLE, CT01200000: Flow=402cfs,Stage=2.33ft,Floodstage=9ft,2023-02-09 02:15,25-75,TENMILE RIVER NEAR GAYLORDSVILLE, CT01199050: Flow=41.8cfs,Stage=1.28ft,2023-02-09 02:00,25-75,SALMON CREEK AT LIME ROCK, CT01199000: Flow=1180cfs,Stage=3.42ft,Floodstage=7ft,2023-02-09 02:15,25-75,HOUSATONIC RIVER AT FALLS VILLAGE, CT01196500: Flow=207cfs,Stage=3.65ft,Floodstage=10ft,2023-02-09 02:00,25-75,QUINNIPIAC RIVER AT WALLINGFORD, CT01195490: Flow=30.3cfs,Stage=3.43ft,2023-02-09 02:45,25-75,QUINNIPIAC RIVER AT SOUTHINGTON, CT01195100: Flow=8.73cfs,Stage=2.02ft,2023-02-09 02:45,25-75,INDIAN RIVER NEAR CLINTON, CT01194500: Flow=59.9cfs,Stage=2.57ft,2023-02-09 02:45,25-75,EAST BRANCH EIGHTMILE RIVER NEAR NORTH LYME, CT01194000: Flow=31.9cfs,Stage=3.23ft,2023-02-09 02:15,25-75,EIGHTMILE RIVER AT NORTH PLAIN, CT01193500: Flow=209cfs,Stage=3.17ft,2023-02-09 02:15,25-75,SALMON RIVER NEAR EAST HAMPTON, CT01192883: Flow=62.3cfs,Stage=5.56ft,2023-02-09 02:00,25-75,COGINCHAUG RIVER AT MIDDLEFIELD, CT01192500: Flow=120cfs,Stage=2.46ft,Floodstage=9ft,2023-02-09 02:30,25-75,HOCKANUM RIVER NEAR EAST HARTFORD, CT01191000: Flow=21.7cfs,Stage=1.82ft,Floodstage=8ft,2023-02-09 02:00,25-75,NORTH BRANCH PARK RIVER AT HARTFORD, CT01189995: Flow=1030cfs,Stage=2.37ft,Floodstage=9ft,2023-02-09 02:15,25-75,FARMINGTON RIVER AT TARIFFVILLE, CT01189000: Flow=79.0cfs,Stage=1.60ft,2023-02-09 02:15,25-75,PEQUABUCK R AT FORESTVILLE, CT.01188090: Flow=598cfs,Stage=5.88ft,Floodstage=12ft,2023-02-09 02:30,25-75,FARMINGTON RIVER AT UNIONVILLE, CT01188000: Flow=5.64cfs,Stage=2.46ft,Floodstage=7ft,2023-02-09 02:30,25-75,BUNNELL BROOK NEAR BURLINGTON, CT01187800: Flow=32.5cfs,Stage=3.95ft,2023-02-09 02:45,25-75,NEPAUG R NR NEPAUG, CT.01187300: Flow=24.3cfs,Stage=1.27ft,2023-02-09 02:30,25-75,HUBBARD RIVER NEAR WEST HARTLAND, CT01186500: Flow=149cfs,Stage=2.50ft,2023-02-09 02:30,25-75,STILL RIVER AT ROBERTSVILLE, CT01186000: Flow=215cfs,Stage=4.00ft,2023-02-09 02:30,25-75,WEST BRANCH FARMINGTON RIVER AT RIVERTON, CT01185500: Flow=135cfs,Stage=3.29ft,Floodstage=8ft,2023-02-09 02:30,25-75,WEST BRANCH FARMINGTON RIVER NEAR NEW BOSTON, MA01184100: Flow=18.4cfs,Stage=1.66ft,2023-02-09 02:00,25-75,STONY BROOK NEAR WEST SUFFIELD, CT01184000: Flow=13500cfs,Stage=9.08ft,Floodstage=15ft,2023-02-09 02:30,25-75,CONNECTICUT RIVER AT THOMPSONVILLE, CT01183500: Flow=785cfs,Stage=4.57ft,Floodstage=13ft,2023-02-09 02:30,25-75,WESTFIELD RIVER NEAR WESTFIELD, MA01127500: Flow=192cfs,Stage=2.74ft,Floodstage=9ft,2023-02-09 02:45,25-75,YANTIC RIVER AT YANTIC, CT01127000: Flow=1780cfs,Stage=7.53ft,Floodstage=17.5ft,2023-02-09 02:30,25-75,QUINEBAUG RIVER AT JEWETT CITY, CT01124000: Flow=354cfs,Stage=3.33ft,2023-02-09 02:00,25-75,QUINEBAUG RIVER AT QUINEBAUG, CT01123000: Flow=58.0cfs,Stage=2.10ft,2023-02-09 02:15,25-75,LITTLE RIVER NEAR HANOVER, CT01122500: Flow=725cfs,Stage=3.54ft,Floodstage=13ft,2023-02-09 02:45,25-75,SHETUCKET RIVER NEAR WILLIMANTIC, CT01122000: Flow=246cfs,Stage=2.72ft,2023-02-09 02:30,25-75,NATCHAUG RIVER AT WILLIMANTIC, CT01121000: Flow=55.4cfs,Stage=1.98ft,Floodstage=7ft,2023-02-09 02:15,25-75,MOUNT HOPE RIVER NEAR WARRENVILLE, CT01119500: Flow=265cfs,Stage=3.92ft,Floodstage=8ft,2023-02-09 02:15,25-75,WILLIMANTIC RIVER NEAR COVENTRY, CT01118500: Flow=762cfs,Stage=5.34ft,Floodstage=7ft,2023-02-09 02:00,25-75,PAWCATUCK RIVER AT WESTERLY, RI01118300: Flow=11.6cfs,Stage=1.72ft,2023-02-09 02:45,25-75,PENDLETON HILL BROOK NEAR CLARKS FALLS, CT01118000: Flow=221cfs,Stage=2.90ft,Floodstage=5ft,2023-02-09 00:15,25-75,WOOD RIVER AT HOPE VALLEY, RI01117800: Flow=96.9cfs,Stage=3.69ft,2023-02-09 02:45,25-75,WOOD RIVER NEAR ARCADIA, RI01117500: Flow=303cfs,Stage=3.11ft,Floodstage=5ft,2023-02-09 02:45,25-75,PAWCATUCK RIVER AT WOOD RIVER JUNCTION, RI01111300: Flow=28.9cfs,Stage=3.70ft,2023-02-09 02:00,25-75,NIPMUC RIVER NEAR HARRISVILLE, RI0137449480: Flow=123cfs,Stage=4.54ft,2023-02-09 02:30,Not ranked,EAST BRANCH CROTON RIVER NEAR PUTNAM LAKE NY012112296: Stage=2.94ft,2023-02-09 02:42,Not ranked,GREENWICH HARBOR AT GRASS ISLAND AT GREENWICH, CT012095493: Flow=5.53cfs,Stage=1.93ft,2023-02-09 02:30,Not ranked,RIDGEFIELD BROOK AT SHIELDS LANE NR RIDGEFIELD, CT012035055: Flow=38.1cfs,Stage=3.13ft,2023-02-09 02:30,Not ranked,POOTATUCK RIVER AT BERKSHIRE011277905: Flow=35.3cfs,Stage=2.58ft,2023-02-09 02:45,Not ranked,LATIMER BROOK NR I-95N EXIT 75 NR FLANDERS, CT011230695: Flow=998cfs,Stage=6.54ft,2023-02-09 02:00,Not ranked,SHETUCKET RIVER AT TAFTVILLE, CT01374890: Flow=42.2cfs,Stage=2.49ft,2023-02-09 02:30,Not ranked,CROSS RIVER NEAR CROSS RIVER NY01374821: Flow=41.0cfs,Stage=2.12ft,2023-02-09 02:30,Not ranked,TITICUS RIVER AT PURDYS STATION NY01374781: Flow=21.4cfs,Stage=2.16ft,2023-02-09 02:30,Not ranked,TITICUS RIVER BELOW JUNE ROAD AT SALEM CENTER NY01374531: Flow=47.9cfs,Stage=1.64ft,2023-02-09 02:00,Not ranked,EAST BRANCH CROTON RIVER NEAR CROTON FALLS NY01374505: Flow=171cfs,Stage=3.66ft,2023-02-09 02:30,Not ranked,EAST BRANCH CROTON RIVER AT BREWSTER NY01212500: Flow=34.1cfs,Stage=2.31ft,2023-02-09 02:45,Not ranked,BYRAM RIVER AT PEMBERWICK, CT01209901: Flow=33.5cfs,Stage=1.73ft,2023-02-09 02:45,Not ranked,RIPPOWAM RIVER AT STAMFORD, CT.01209761: Flow=2.83cfs,Stage=2.06ft,2023-02-09 02:00,Not ranked,FIVEMILE RIVER NEAR NEW CANAAN, CT01209510: Stage=2.08ft,2023-02-09 02:54,Not ranked,SAUGATUCK RIVER AT ROUTE 1 AT WESTPORT, CT01209105: Flow=21.5cfs,Stage=2.78ft,2023-02-09 02:00,Not ranked,ASPETUCK RIVER AT ASPETUCK, CT01209005: Flow=11.0cfs,Stage=2.53ft,2023-02-09 02:45,Not ranked,SAUGATUCK R BELOW SAUGATUCK RES NR LYONS PLAIN, CT01203805: Flow=52.0cfs,Stage=2.50ft,2023-02-09 02:15,Not ranked,WEEKEEPEEMEE RIVER AT HOTCHKISSVILLE, CT01203510: Flow=54.0cfs,Stage=4.20ft,2023-02-09 02:00,Not ranked,POOTATUCK RIVER AT SANDY HOOK, CT01202501: Flow=67.2cfs,Stage=2.71ft,2023-02-09 02:15,Not ranked,SHEPAUG RIVER AT PETERS DAM AT WOODVILLE, CT01201487: Flow=105cfs,Stage=7.54ft,2023-02-09 02:45,Not ranked,STILL RIVER AT ROUTE 7 AT BROOKFIELD CENTER, CT01196561: Flow=28.6cfs,Stage=1.87ft,2023-02-09 02:15,Not ranked,MUDDY RIVER NEAR EAST WALLINGFORD, CT01194815: Stage=0.54ft,2023-02-09 02:42,Not ranked,CONNECTICUT RIVER NR BRIDGE ST NR OLD SAYBROOK, CT01194796: Stage=2.04ft,2023-02-09 01:55,Not ranked,CONNECTICUT RIVER AT OLD LYME, CT01194750: Stage=1.99ft,2023-02-09 02:20,Not ranked,CONNECTICUT RIVER AT ESSEX, CT01193050: Flow=15600cfs,2023-02-09 02:45,Stage=3.01ft,2023-02-09 02:55:00,Floodstage=7ft,Not ranked,CONNECTICUT RIVER AT MIDDLE HADDAM, CT01190070: Stage=4.47ft,Floodstage=16ft,2023-02-09 02:30,Not ranked,CONNECTICUT RIVER AT HARTFORD, CT01125490: Flow=75.5cfs,Stage=2.14ft,2023-02-09 02:00,Not ranked,LITTLE RIVER AT HARRISVILLE, CT01125100: Flow=188cfs,Stage=7.48ft,2023-02-09 02:15,Not ranked,FRENCH RIVER AT NORTH GROSVENORDALE, CT01121330: Flow=42.0cfs,Stage=3.74ft,2023-02-09 02:15,Not ranked,FENTON RIVER AT MANSFIELD, CT01120790: Flow=119cfs,Stage=3.30ft,2023-02-09 02:00,Not ranked,NATCHAUG RIVER AT MARCY RD. NEAR CHAPLIN, CT01119382: Flow=204cfs,Stage=1.89ft,2023-02-09 02:15,Not ranked,WILLIMANTIC RIVER AT MERROW RD. NEAR MERROW, CT01115187: Flow=28.5cfs,Stage=1.90ft,2023-02-09 01:00,Not ranked,PONAGANSET RIVER AT SOUTH FOSTER, RIGo to WaterWatch (offsite) for a larger map with additional options
[color code for] High
[color code for] > 90th percentile
[color code for] 76th - 90th percentile
[color code for] 25th - 75th percentile
[color code for] 10th - 24th percentile
[color code for] < 10th percentile
[color code for] Low
[color code for] Not ranked
The colored dots on this map depict streamflow conditions as a percentile, which is computed from the period of record for the current day of the year. Only stations with at least 30 years of record are used.
The gray circles indicate other stations that were not ranked in percentiles either because they have fewer than 30 years of record or because they report parameters other than streamflow. Some stations, for example, measure stage only.

Statewide Streamflow Table

Current data typically are recorded at 15- to 60-minute intervals, stored onsite, and then transmitted to USGS offices every 1 to 4 hours, depending on the data relay technique used. Recording and transmission times may be more frequent during critical events. Data from current sites are relayed to USGS offices via satellite, telephone, and/or radio telemetry and are available for viewing within minutes of arrival.

All real-time data are provisional and subject to revision.

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