CH Bc 77
U.S. Geological Survey
Located in Charles County, Maryland, this groundwater monitoring location is associated with a water well in the Northern Atlantic Coastal Plain aquifer system.
Well Construction
| Depth | Description | |
|---|---|---|
| 0.0-60.0 ft | 16.0 in diameter steel casing | |
| 0.0-870.0 ft | 8.0 in diameter steel casing | |
| 845.0-925.0 ft | 6.0 in diameter steel casing | |
| 925.0-955.0 ft | 6.0 in diameter steel screen |
No lithology data is available
-
Agency U.S. Geological Survey Site Name CH Bc 77 Site Number 383644077055501 Site Type WELL Lat/Long (NAD83) 38.6121, -77.0993 Well Depth 955 Feet Elevation (NGVD29) 96.64 ft Latitude 38.6121111111111 Longitude -77.0993333333333 Local Aquifer Name Patuxent Formation (None) National Aquifer Name Northern Atlantic Coastal Plain aquifer system (S100NATLCP) 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 -
-
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 222.30 130.46 94.00 1990-08-10 2025-09-29 213 35.1 225.68 0.0 Statistics Calculated 2026-02-26 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 211.71 208.43 153.30 122.16 107.06 96.13 95.12 14 14 Feb 201.11 199.14 170.80 121.48 107.08 96.20 95.66 14 14 Mar 212.03 209.06 186.25 128.67 120.42 109.76 108.02 15 15 Apr 222.30 216.11 200.23 180.54 124.24 98.93 95.72 20 20 May 206.65 205.18 150.10 122.04 114.37 103.22 100.55 12 12 Jun 214.98 209.44 200.18 182.64 137.07 116.19 110.62 18 18 Jul 197.92 190.02 130.79 120.71 106.97 98.12 95.67 12 12 Aug 204.88 197.43 124.91 113.98 101.4 94.05 94.00 10 10 Sep 221.73 212.84 198.60 158.84 121.72 102.3 95.70 26 26 Oct 190.30 189.91 148.91 113.33 102.8 95.73 95.72 10 10 Nov 210.92 206.67 188.51 153.00 121.63 106.53 104.20 20 20 Dec 205.48 193.98 178.80 146.12 113.16 99.69 95.43 21 21 Statistics Calculated 2026-02-26 -
Operated in cooperation with:
