17S15W18DBB1 Monsanto
U.S. Geological Survey
Located in Union County, Arkansas, this groundwater monitoring location is associated with a water well in the Mississippi embayment aquifer system.
Well Construction
| Depth | Description | |
|---|---|---|
| 0.0-None ft | 8.0 in diameter none casing | |
| -2.0-516.0 ft | 6.0 in diameter none casing | |
| 516.0-536.0 ft | 4.0 in diameter screen |
| Depth | Lithology | Description |
|---|---|---|
| 230.0-540.0 ft | Sand | Sand |
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Agency U.S. Geological Survey Site Name 17S15W18DBB1 Monsanto Site Number 331438092411901 Site Type WELL Lat/Long (NAD83) 33.2442, -92.6914 Well Depth 540 Feet Elevation (NGVD29) 182.93 ft Latitude 33.2441555555556 Longitude -92.6914472222222 Local Aquifer Name Sparta Sand (None) National Aquifer Name Mississippi embayment aquifer system (S100MSEMBM) 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 381.37 328.66 122.00 1942-01-01 2025-04-21 13383 83.2 222.46 100.0 Statistics Calculated 2025-04-22 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 377.42 360.54 338.25 325.86 284.37 232.31 122.00 68 68 Feb 377.39 360.83 338.23 327.60 287.76 250.26 229.39 63 63 Mar 375.68 359.50 337.70 325.72 287.21 249.13 227.97 63 63 Apr 377.45 360.33 341.89 327.89 288.32 249.07 225.93 69 69 May 377.40 360.45 336.39 323.78 286.35 246.66 224.59 63 63 Jun 377.64 360.33 342.85 329.57 289.44 248.38 223.82 63 63 Jul 377.50 360.34 341.66 333.12 290.46 244.23 160.00 65 65 Aug 378.19 360.96 345.14 334.60 291.98 250.69 225.67 64 64 Sep 377.63 359.67 346.71 334.24 291.76 250.80 225.62 62 62 Oct 379.74 360.57 341.89 330.84 289.58 245.99 125.00 64 64 Nov 378.43 360.76 341.41 328.93 288.94 248.44 224.41 64 64 Dec 377.34 360.63 339.08 326.71 288.60 247.55 222.46 64 64 Statistics Calculated 2025-04-22 -
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