CURRENT WATER RESOURCES CONDITIONS IN CONNECTICUT

U.S. Department of the Interior Seal

October 2023

USGS New England Water Science Center, Connecticut Office

PROVISIONAL DATA: All data presented in this report are provisional and subject to revision.
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Monthly Surface Water Conditions MapMonthly Groundwater Conditions Map

 

SURFACE WATER
Station
Number
Station
Name
Drainage
Area (mi2)
Years Of
Record
Normal
Range (cfs)
Monthly
Mean (cfs)
Monthly
Mean (in)
Percentile
Class
01118300 Pendleton Hill Brook near Clarks Falls, CT4.02651.74 - 5.114.931.41 Normal
01121000 Mount Hope River near Warrenville, CT28.68310 - 35.657.52.32 Above normal
01123000 Little River near Hanover, CT307213.4 - 3987.23.35 Much above normal
01184100 Stony Brook near West Suffield, CT10.4424.92 - 17.320.72.29 Above normal
01188000 Bunnell Brook near Burlington, CT4.1922 - 7.0412.93.63 Much above normal
01193500 Salmon River near East Hampton, CT1009530.2 - 1202723.14 Much above normal
01194500 East Branch Eightmile River near North Lyme, CT22.3867.18 - 29.744.62.31 Above normal
01195100 Indian River near Clinton, CT5.68411.34 - 5.867.91.60 Above normal
01196620 Mill River near Hamden, CT24.5559.88 - 35.348.12.26 Above normal
01204000 Pomperaug River at Southbury, CT75.19122.4 - 1022313.55 Much above normal
01208990 Saugatuck River near Redding, CT21595.42 - 32653.57 Much above normal

 

GROUNDWATER
Station
Number
Station
Name
Years Of
Record
Normal
Range (ft)
Monthly
Median (ft)
Departure
From Monthly
Median (ft)
Percentile
Class
410628073413301 GW 21 (Greenwich, CT)221 41.30 - 23.0024.39-11.91 Normal
412429073165101 NT 15 (Newtown, CT)561 9.24 - 5.802.71-5.21 Much above normal
412825072410501 D 117 (Durham, CT)371 12.20 - 9.889.55-1.36 Above normal
412916073121701 SB 42 (Southbury, CT)301 21.30 - 15.7012.14-6.26 Much above normal
414240072033201 SC 22 (Scotland, CT)381 13.70 - 13.209.89-3.51 High
414741072134501 MS 44 (Mansfield, CT)401 6.04 - 2.512.41-1.09 Above normal
414831072173002 MS 80 (Mansfield, CT)211 21.90 - 16.5014.72-4.98 Above normal
1 Daily Value Records and Field Readings
2 Daily Value Records Only

 

Flow or Water LevelPercentile RangeExplanation
Low0thThe monthly mean streamflow or median water level during this month is the lowest ever recorded during the period of record for this site.
Much below normal0th to 10thThe monthly mean streamflow or median water level during this month is less than the 10th percentile when compared to all of the months during the period of record for this site.
Below normal10th to 25thThe monthly mean streamflow or median water level during this month is between the 10th and 25th percentiles when compared to all of the months during the period of record for this site.
Normal25th to 75thThe monthly mean streamflow or median water level during this month is between the 25th and 75th percentiles when compared to all of the months during the period of record for this site.
Above normal75th to 90thThe monthly mean streamflow or median water level during this month is between the 75th and 90th percentiles when compared to all of the months during the period of record for this site.
Much above normal90th to 100thThe monthly mean streamflow or median water level during this month is greater than the 90th percentile when compared to all of the months during the period of record for this site.
High100thThe monthly mean streamflow or median water level during this month is the highest ever recorded during the period of record for this site.
410628073413301 GW 21 (Greenwich, CT), October 2023 mean water level 24.39 feet 412429073165101 NT 15 (Newtown, CT), October 2023 mean water level 2.71 feet 412825072410501 D 117 (Durham, CT), October 2023 mean water level 9.545 feet 412916073121701 SB 42 (Southbury, CT), October 2023 mean water level 12.14 feet 414240072033201 SC 22 (Scotland, CT), October 2023 mean water level 9.89 feet 414741072134501 MS 44 (Mansfield, CT), October 2023 mean water level 2.41 feet 414831072173002 MS 80 (Mansfield, CT), October 2023 mean water level 14.72 feet 01118300 Pendleton Hill Brook near Clarks Falls, CT, October 2023 mean streamflow 4.93 cfs 01121000 Mount Hope River near Warrenville, CT, October 2023 mean streamflow 57.5 cfs 01123000 Little River near Hanover, CT, October 2023 mean streamflow 87.2 cfs 01184100 Stony Brook near West Suffield, CT, October 2023 mean streamflow 20.7 cfs 01188000 Bunnell Brook near Burlington, CT, October 2023 mean streamflow 12.9 cfs 01193500 Salmon River near East Hampton, CT, October 2023 mean streamflow 272 cfs 01194500 East Branch Eightmile River near North Lyme, CT, October 2023 mean streamflow 44.6 cfs 01195100 Indian River near Clinton, CT, October 2023 mean streamflow 7.9 cfs 01196620 Mill River near Hamden, CT, October 2023 mean streamflow 48.1 cfs 01204000 Pomperaug River at Southbury, CT, October 2023 mean streamflow 231 cfs 01208990 Saugatuck River near Redding, CT, October 2023 mean streamflow 65 cfs