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USGS Daily Statistics 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.

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 410628073413301 CT- GW 21 GREENWICH, CT


Fairfield County, Connecticut
Hydrologic Unit Code 01100006
Latitude  41°06'28.4", Longitude  73°41'32.6" NAD83
Land-surface elevation 465.11 feet above NAVD88
The depth of the well is 350 feet below land surface.
The depth of the hole is 350 feet below land surface.
This well is completed in the New York and New England carbonate-rock aquifers (N400NYNECB) national aquifer.
This well is completed in the Carbonate Crystalline Bedrock (300CBCL) local aquifer.
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72019, Depth to water level, feet below land surface,
Day of
month
Mean of daily mean values for each day for water year of record in, ft   (Calculation Period 2001-10-01 -> 2021-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 27.86 25.34 24.19 22.47 22.72 24.47 27.16 31.26 33.58 34.82 34.54 32.37
2 27.64 25.38 24.07 22.46 22.88 24.58 27.43 31.41 33.76 34.83 34.52 32.29
3 27.41 25.4 23.99 22.43 22.88 24.64 27.43 31.55 33.81 34.87 34.54 32.19
4 27.75 25.4 23.91 22.5 22.87 24.71 27.52 31.28 33.99 34.87 34.53 32.1
5 27.54 25.39 23.86 22.4 22.9 24.72 27.54 31.28 34.11 34.85 34.46 32
6 27.33 25.4 23.8 22.41 22.96 24.81 27.67 31.3 34.26 34.92 34.38 31.88
7 27.17 25.37 23.68 22.42 22.99 24.95 27.69 31.42 34.28 34.97 34.31 31.79
8 27.03 25.35 23.54 22.46 23.06 25.02 27.99 31.43 34.32 35.08 34.25 32.45
9 26.91 25.35 23.48 22.5 23.13 25.03 28.25 31.54 34.23 35.14 34.15 32.35
10 26.79 25.31 23.43 22.55 23.23 25.09 28.38 31.7 34.27 35.2 34.03 32.16
11 26.65 25.28 23.36 22.59 23.24 25.14 28.46 32.12 34.25 35.24 34 31.93
12 26.51 25.22 23.3 22.64 23.27 25.64 28.63 32.11 34.3 35.33 33.97 31.65
13 26.43 25.15 23.26 22.65 23.3 25.71 28.76 32.11 34.3 34.79 34.01 31.36
14 26.32 25.07 22.84 22.66 23.32 25.45 28.94 32.22 34.42 34.66 33.98 30.63
15 26.24 24.98 22.77 22.63 23.32 25.52 29.04 32.34 34.45 35.31 33.95 30.34
16 26.11 24.89 23.02 22.47 23.4 25.91 29.15 32.49 34.59 35.17 33.9 30.14
17 26.01 24.84 22.99 22.36 23.44 26.01 29.47 32.65 34.63 35.14 33.85 29.94
18 25.9 24.78 22.95 22.33 23.53 26.07 29.77 32.8 34.67 35.16 33.76 29.77
19 25.83 24.75 22.92 22.33 23.53 26.09 29.92 32.86 34.76 35.16 33.62 29.63
20 25.76 24.74 22.9 22.37 23.51 26.18 30.08 32.95 34.88 35.17 33.45 29.57
21 25.73 24.72 22.87 22.43 23.54 26.16 30.24 33.12 34.94 35.2 33.47 29.48
22 25.7 24.69 22.85 22.47 23.64 26.22 30.32 33.16 35.06 35.21 33.31 29.36
23 25.67 24.66 22.81 22.66 23.74 26.27 30.38 33.14 35.16 35.18 33.17 29.25
24 25.63 24.6 22.76 22.68 23.84 26.39 30.44 32.75 35.34 35.18 33.02 29.15
25 25.6 24.51 22.72 22.69 23.91 26.53 30.54 32.89 35.41 35.16 32.89 29.04
26 25.53 24.44 22.68 22.73 24.02 26.67 30.64 33.6 35.42 35.14 32.85 28.94
27 25.45 24.33 22.68 22.74 24.1 26.75 30.8 33.16 35.36 35.11 32.72 28.77
28 25.39 24.26 22.72 22.8 24.2 26.86 31.12 33.27 35.35 35.08 32.64 28.59
29 25.35 23.01 22.7 22.71 24.27 26.86 31.28 33.21 35.31 34.71 32.58 28.4
30 25.34   22.47 22.74 24.37 26.96 31.14 33.44 34.4 34.67 32.48 28.23
31 25.35   22.4   24.43   31.28 33.5   34.6   28.06