Ev-691
U.S. Geological Survey
Located in Evangeline Parish, Louisiana, this groundwater monitoring location is associated with a water well in the Coastal lowlands aquifer system.
Well Construction
| Depth | Description | |
|---|---|---|
| -2.0-365.0 ft | 2.0 in diameter galvanized iron casing | |
| 375.0-387.0 ft | 2.0 in diameter galvanized iron casing | |
| 365.0-375.0 ft | 2.0 in diameter stainless steel screen |
| Depth | Lithology | Description |
|---|---|---|
| 350.0-380.0 ft | Sand | Sand |
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Agency U.S. Geological Survey Site Name Ev-691 Site Number 305049092164102 Site Type WELL Lat/Long (NAD83) 30.8469, -92.2781 Well Depth 375 Feet Elevation (NGVD29) 50.0 ft Latitude 30.8469444444444 Longitude -92.2780555555556 Local Aquifer Name Evangeline Aquifer (None) National Aquifer Name Coastal lowlands aquifer system (S100CSLLWD) 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 27.23 23.11 8.65 1967-04-26 2026-02-11 1236 58.8 26.91 0.0 Statistics Calculated 2026-04-02 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 Feb 26.18 26.06 25.67 20.94 13.02 11.76 11.69 17 17 Mar 26.18 26.12 25.13 16.63 13.20 10.7 8.65 16 16 Apr 26.12 25.82 25.44 19.34 12.82 11.63 11.57 16 16 May 26.34 26.26 25.83 25.08 22.07 11.75 11.67 14 14 Jul 26.57 26.56 26.05 23.11 13.41 12.77 12.11 15 15 Aug 26.39 26.36 26.16 23.24 19.90 11.95 11.94 11 11 Oct 27.23 26.85 26.29 20.51 13.53 12.11 12.10 18 18 Nov 26.92 26.71 26.30 25.14 21.87 12.05 11.96 13 13 Statistics Calculated 2026-04-02 -
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