WTS-91G
Illinois State Water Survey
Located in Whiteside County, Illinois, this groundwater monitoring location is associated with a water well in the Sand and gravel aquifers (glaciated regions).
Well Construction
| Depth | Description | |
|---|---|---|
| 0.0-73.5 ft | 2.0 in diameter pvc casing | |
| 73.5-None ft | 2.0 in diameter pvc screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-52.0 ft | unknown | sand, course to granules |
| 52.0-68.0 ft | unknown | clay |
| 68.0-82.0 ft | unknown | sand, gray, fine |
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Agency Illinois State Water Survey Site Name WTS-91G Site Number P381645 Site Type WELL Lat/Long (WGS84) 41.7145, -89.7495 Well Depth 99 Feet Elevation (NAVD88) 638.75 ft Latitude 41.714454 Longitude -89.749504 Local Aquifer Name Sankoty Aquifer (None) National Aquifer Name Sand and gravel aquifers (glaciated regions) (N100GLCIAL) Aquifer Type CONFINED Water-Level Well Type Trend Water-Level Well Characteristics Known Changes Water Quality Network Additional info Link 1 -
Activity Start Date Activity Start Time Characteristic Name Measure Value Units Detection Limit Value Type Sample Fraction Method Name Analytical Method System Sample Method ID Sample Method ID Context Sample Method Name Activity Type Code Data Provided By -
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How do we calculate statistics?
Overall Water Level Statistics (Depth to water, feet below land surface) Lowest Water Level Median Water Level Highest Water Level First Measurement Date Last Measurement Date Number of Measurements Years of Record Latest Value Latest Percentile 29.80 14.01 9.99 1991-07-08 2026-01-12 7237 34.5 16.19 0.0 Statistics Calculated 2026-01-12 Monthly Water Level Statistics (Depth to water, feet below land surface) Month Lowest Median 10th Percentile 25th Percentile 50th Percentile 75th Percentile 90th Percentile Highest Median Number of Measurements Years of Record Jan 15.94 15.72 14.98 13.92 12.96 12.35 12.25 12 12 Feb 15.37 15.24 14.39 14.03 12.79 12.31 12.30 13 13 Mar 15.30 15.08 14.05 13.17 12.47 12.19 11.59 17 17 Apr 15.19 15.18 14.58 13.77 12.51 11.53 11.17 20 20 May 15.25 15.22 14.46 13.35 12.40 11.53 11.12 20 20 Jun 24.79 20.17 15.73 14.05 12.11 11.25 10.28 24 24 Jul 22.98 20.31 18.94 16.80 14.13 12.44 10.93 27 27 Aug 22.43 22.10 20.04 15.51 13.40 11.91 11.33 27 27 Sep 19.66 17.13 16.00 14.52 13.17 11.63 10.81 21 21 Oct 15.96 15.96 14.96 13.62 13.15 11.51 11.45 21 21 Nov 15.99 15.97 15.02 13.81 13.34 11.94 11.93 17 17 Dec 16.09 16.05 15.01 13.86 12.72 12.24 12.21 19 19 Statistics Calculated 2026-01-12 -
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