Latitude 42°23'08", Longitude 88°23'10" NAD83 Mchenry County, Illinois, Hydrologic Unit 07120006
Well depth: 153.1 feet Hole depth: 176 feet Land surface altitude: 855.97feet above NAVD88. Well completed in "Sand and gravel aquifers (glaciated regions)" (N100GLCIAL) national aquifer. Well completed in "Quaternary System" (110QRNR) local aquifer
This site is operated in cooperation with McHenry County, Illinois.
Site Statistics
Most recent data value: 18.86 on 5/17/2022
Period of Record Monthly Statistics for 422308088231002 Depth to water level, feet below land surface All Approved Continuous & Periodic Data Used In Analysis
Note: Highlighted values in the table indicate closest statistic to the most recent data value.
Month
Lowest Median
10th %ile
25th %ile
50th %ile
75th %ile
90th %ile
Highest Median
Number of Years
Jan
19.81
19.74
18.92
17.52
16.02
14.57
14.53
13
Feb
19.70
19.63
19.16
17.37
16.05
14.84
14.68
14
Mar
19.38
19.15
17.95
16.67
15.57
14.48
14.22
13
Apr
18.86
18.65
17.56
16.51
15.17
14.24
14.16
13
May
18.72
18.69
18.02
16.15
14.76
13.76
13.68
13
Jun
20.40
20.11
18.53
17.52
15.15
14.23
14.17
13
Jul
21.91
20.86
18.55
17.84
15.55
15.02
14.94
13
Aug
20.36
20.10
18.72
16.66
15.94
15.64
15.59
13
Sep
19.96
19.75
18.58
17.15
16.40
15.22
14.88
13
Oct
19.48
19.34
18.18
17.28
16.27
14.06
13.77
13
Nov
19.46
19.31
18.08
17.23
16.32
14.18
14.02
13
Dec
19.67
19.45
18.46
17.30
16.18
14.34
14.30
13
.As of 5/14/2022 09:12-2
Statistics Options
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Daily Groundwater Data
Most recent Provisional daily data value: 18.86 on 05/17/22
Summary for Period of Continuous Record
Depth to water level, feet below land surface
Approved Daily Maximum Values Data Used in Analysis
Begin Date
End Date
Days
% Complete
02/27/09
02/09/22
4,727
99
Lowest Level
5th %ile
10th %ile
25th %ile
50th %ile
75th %ile
90th %ile
95th %ile
Highest Level
22.89
19.72
19.36
18.33
17.13
15.87
14.65
14.25
12.91
Daily Data Options
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Periodic Groundwater Data
Summary for Period of Record Periodic Water Levels
Depth to water level, feet below land surface
Approved Periodic Water Level Values
Begin Date
End Date
Number of Values
02/26/09
02/17/22
43
Highest WL
Date of Highest WL
Lowest WL
Date of Lowest WL
14.03
11/19/19
19.84
10/10/12
Groundwater Levels Options
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Note: The most recent measurement on 02/17/2022 has the following status: ''
Period of Record - All Data Types
Summary for Period of Record - All Data Types
Depth to water level, feet below land surface
Begin Date
End Date
Number of Values
02/26/09
05/17/22
5,593
Highest WL
Date of Highest WL
Lowest WL
Date of Lowest WL
12.91
05/23/20
22.89
07/08/12
Period of Record Options
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*References to non-Department of the Interior (DOI) products do not constitute an endorsement by the DOI.
