Latitude 41°43'16", Longitude 91°25'20" NAD27 Johnson County, Iowa, Hydrologic Unit 07080209
Land surface altitude: 756.5 feet above sea level NGVD29. Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer. Well completed in "SILURIAN SYSTEM" (350SLRN) local aquifer
Period of Record Monthly Statistics for 414315091252002 Depth to water level, feet below land surface All Approved Continuous & Periodic Data Used In Analysis
Note: Bold values in the table indicate closest statistic to the most recent data value.
Month
Lowest Level
10th %ile
25th %ile
50th %ile
75th %ile
90th %ile
Highest Level
Number of Years
Jan
20.99
19.76
18.09
16.99
15.50
14.68
13.98
50
Feb
20.80
19.18
17.73
16.51
15.60
14.73
13.35
52
Mar
20.60
18.15
17.07
15.78
14.86
14.15
12.76
50
Apr
19.61
17.99
16.06
15.39
13.90
11.47
6.08
50
May
19.80
17.25
16.15
15.53
14.33
13.29
11.29
56
Jun
20.89
17.60
16.64
15.89
14.78
13.71
11.69
49
Jul
20.94
18.75
17.27
16.33
15.40
13.89
11.94
54
Aug
21.65
19.69
18.18
17.10
15.77
14.33
11.49
48
Sep
21.05
20.03
18.70
17.64
16.37
15.74
14.29
53
Oct
20.81
19.65
18.42
17.24
15.90
14.45
6.25
53
Nov
21.03
19.86
18.37
17.17
15.70
14.58
5.58
44
Dec
21.24
19.74
18.16
16.74
15.37
14.74
13.10
54
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Daily Groundwater Data
Most recent Provisional daily data value: 13.00 on 11/23/09
Summary Statistics for Period of Continuous Record
Depth to water level, feet below land surface
Approved Daily Mean Values Data Used in Analysis
Begin Date
End Date
Days
% Complete
07/22/98
10/26/08
3,701
98
Highest Level
95-Pct
75-Pct
50-Pct
25-Pct
5-Pct
Lowest Level
7.74
12.90
14.95
16.13
17.62
19.35
20.24
Daily Data Options
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Periodic Groundwater Data
Summary Statistics 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
10/24/41
12/22/08
787
Highest WL
Date of Highest WL
Lowest WL
Date of Lowest WL
5.58
11/27/92
21.65
08/21/89
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Period of Record - All Data Types
Summary Statistics for Period of Record - All Data Types
Depth to water level, feet below land surface
Begin Date
End Date
Number of Values
10/24/41
11/23/09
4,836
Highest WL
Date of Highest WL
Lowest WL
Date of Lowest WL
5.58
11/27/92
21.65
08/21/89
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