Des Plaines 7
Illinois State Water Survey
Located in Cook County, Illinois, this groundwater monitoring location is associated with a water well in the Cambrian-Ordovician aquifer system.
Well Construction
| Depth | Description | |
|---|---|---|
| 0.0-960.0 ft | 26.0 in diameter steel casing | |
| - ft | none screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-107.0 ft | unknown | drift |
| 107.0-200.0 ft | unknown | Silurian Dolomite |
| 200.0-437.0 ft | unknown | Maquoketa Shale |
| 437.0-755.0 ft | unknown | Galena-Platteville |
| 755.0-960.0 ft | unknown | St. Peter Sandstone |
| 960.0-1225.0 ft | unknown | Eminence-Potosi |
| 1225.0-1383.0 ft | unknown | Ironton-Galesville Sandstone |
| 1383.0-1518.0 ft | unknown | Eau Claire |
| 1518.0-1815.0 ft | unknown | Elmhurst-Mt. Simon Sandstone |
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Agency Illinois State Water Survey Site Name Des Plaines 7 Site Number P410748 Site Type WELL Lat/Long (WGS84) 42.0224, -87.9254 Well Depth 1845 Feet Elevation (NAVD88) 655.48 ft Latitude 42.022379 Longitude -87.925434 Local Aquifer Name Ironton-Galesville Sandstone (None) National Aquifer Name Cambrian-Ordovician aquifer system (S300CAMORD) 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 612.00 518.00 334.28 1959-07-01 2025-11-17 4897 66.3 335.55 100.0 Statistics Calculated 2026-01-01 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 575.00 551.00 540.50 518.00 475.90 344.98 336.00 29 29 Feb 575.00 555.00 541.25 521.00 471.46 344.93 335.69 34 34 Mar 558.00 551.00 542.00 518.00 443.97 344.58 335.05 31 31 Apr 591.00 553.80 540.50 519.00 457.18 340.20 334.85 33 33 May 580.00 556.40 539.00 506.00 376.70 339.54 334.67 32 32 Jun 576.00 560.00 543.50 503.00 377.44 337.87 334.79 28 28 Jul 592.00 564.20 546.50 507.50 385.69 343.95 335.10 43 43 Aug 600.00 566.50 547.00 515.32 354.11 339.23 335.35 34 34 Sep 597.00 566.40 551.00 536.00 348.25 339.10 335.65 31 31 Oct 590.00 562.20 549.75 516.00 360.25 342.23 335.86 36 36 Nov 562.00 555.80 546.00 520.00 367.70 339.34 335.59 31 31 Dec 579.50 555.00 543.00 520.00 463.64 345.15 336.50 29 29 Statistics Calculated 2026-01-01 -
Operated in cooperation with:
