Lake Phelps
North Carolina Division of Water Resources
Located in Washington County, North Carolina, this groundwater monitoring location is associated with a water well in the Castle Hayne aquifer.
Well Construction
| Depth | Description | |
|---|---|---|
| -1.16-503.0 ft | 6.0 in diameter black ductile iron casing | |
| 503.0-580.0 ft | 4.0 in diameter open hole screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-16.0 ft | - | Surficial Aquifer |
| 16.0-32.0 ft | - | Yorktown CU |
| 32.0-336.0 ft | - | Yorktown Aquifer |
| 336.0-384.0 ft | - | Castle Hayne CU |
| 384.0-592.0 ft | - | Castle Hayne Aquifer |
| 592.0-652.0 ft | - | Beaufort CU |
| 652.0-818.0 ft | - | Beaufort Aquifer |
| 818.0-861.0 ft | - | Upper Cape Fear CU |
| 861.0-899.0 ft | - | Upper Cape Fear Aquifer |
-
Agency North Carolina Department of Environmental Quality Division of Water Resources Site Name Lake Phelps Site Number L13I5 Site Type WELL Lat/Long (NAD83) 35.7307, -76.4344 Well Depth 580 Feet Elevation (NAVD88) 14.996 ft Latitude 35.730718 Longitude -76.43438 Local Aquifer Name Castle Hayne (None) National Aquifer Name Castle Hayne aquifer (N400CSLHYN) Aquifer Type CONFINED Water-Level Well Type Trend Water-Level Well Characteristics Background Water Quality Network 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 1978-06-27 00:00:00 EST Chloride 640 mg/L 0 None unfiltered titration None Unknown NCDWR titration Unknown NCDWR 1999-10-12 00:00:00 EST Salinity 1.3 ppth None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 1999-10-12 00:00:00 EST Chloride 395 mg/L 0 None unfiltered titration None Unknown NCDWR YSI Unknown NCDWR 1999-10-12 00:00:00 EST Specific Conductance 2352 uS/cm None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2004-09-14 00:00:00 EST Salinity 1.2 ppth None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2004-09-14 00:00:00 EST Chloride 357 mg/L 0 None unfiltered titration None Unknown NCDWR YSI Unknown NCDWR 2004-09-14 00:00:00 EST Specific Conductance 2323 uS/cm None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2007-09-19 00:00:00 EST Salinity 1.2 ppth None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2007-09-19 00:00:00 EST Chloride 434 mg/L 0 None unfiltered titration None Unknown NCDWR YSI Unknown NCDWR 2007-09-19 00:00:00 EST Specific Conductance 2233 uS/cm None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2007-09-19 00:00:00 EST pH 9.38 None None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2010-09-22 00:00:00 EST Chloride 463 mg/L 0 None unfiltered titration None Unknown NCDWR titration Unknown NCDWR 2010-09-22 00:00:00 EST Specific Conductance 2288 uS/cm None unfiltered YSI None Unknown NCDWR titration Unknown NCDWR 2010-09-22 00:00:00 EST pH 9.33 None None unfiltered YSI None Unknown NCDWR titration Unknown NCDWR 2010-09-22 00:00:00 EST Salinity 1.2 ppth None unfiltered YSI None Unknown NCDWR titration Unknown NCDWR 2012-09-25 00:00:00 EST pH 9.58 None None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2012-09-25 00:00:00 EST Salinity 1.1 ppth None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2012-09-25 00:00:00 EST Chloride 405 mg/L 0 None unfiltered titration None Unknown NCDWR YSI Unknown NCDWR 2012-09-25 00:00:00 EST Specific Conductance 2188 uS/cm None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2015-09-22 00:00:00 EST Salinity 1.2 ppth None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2015-09-22 00:00:00 EST Chloride 362 mg/L 0 None unfiltered titration None Unknown NCDWR YSI Unknown NCDWR 2015-09-22 00:00:00 EST Specific Conductance 2255 uS/cm None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2015-09-22 00:00:00 EST pH 9.65 None None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2017-08-31 00:00:00 EST Salinity 1.1 ppth None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2017-08-31 00:00:00 EST Chloride 357 mg/L 0 None unfiltered titration None Unknown NCDWR YSI Unknown NCDWR 2017-08-31 00:00:00 EST Specific Conductance 2160 uS/cm None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2017-08-31 00:00:00 EST pH 9.46 None None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2019-09-24 00:00:00 EST Chloride 408 mg/L 0 None unfiltered titration None Unknown NCDWR titration Unknown NCDWR 2019-09-24 00:00:00 EST Specific Conductance 2088 uS/cm None unfiltered YSI None Unknown NCDWR titration Unknown NCDWR 2019-09-24 00:00:00 EST pH 9.19 None None unfiltered YSI None Unknown NCDWR titration Unknown NCDWR 2019-09-24 00:00:00 EST Salinity 1.1 ppth None unfiltered YSI None Unknown NCDWR titration Unknown NCDWR 2023-10-06 00:00:00 EST pH 9.1 None None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2023-10-06 00:00:00 EST Salinity 1.2 ppth None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR 2023-10-06 00:00:00 EST Chloride 393 mg/L 0 None unfiltered titration None Unknown NCDWR YSI Unknown NCDWR 2023-10-06 00:00:00 EST Specific Conductance 2214 uS/cm None unfiltered YSI None Unknown NCDWR YSI Unknown NCDWR -
-
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 22.12 15.63 12.56 1978-06-27 2025-02-14 4476 46.7 15.72 50.00 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 18.78 17.72 15.86 15.19 14.08 13.65 12.77 29 29 Feb 18.17 17.94 17.18 15.79 14.94 13.69 12.98 25 25 Mar 17.42 17.41 17.12 15.13 14.60 13.35 13.32 16 16 Apr 17.69 17.48 16.82 14.82 13.75 13.50 13.34 18 18 May 18.01 17.53 17.15 15.39 14.83 13.59 13.40 27 27 Jun 18.05 18.04 16.88 15.33 14.75 13.55 13.52 16 16 Jul 20.59 18.62 17.49 15.49 14.35 13.63 12.82 29 29 Aug 20.44 19.11 18.65 16.53 15.51 14.07 12.56 25 25 Sep 19.09 18.96 17.73 16.16 15.29 13.73 12.73 19 19 Oct 19.11 18.84 16.97 15.61 13.95 13.76 13.00 22 22 Nov 19.08 18.69 18.10 16.11 15.73 13.69 13.02 25 25 Dec 17.64 17.56 16.53 15.84 15.61 14.30 14.01 12 12 Statistics Calculated 2025-04-22 -
Operated in cooperation with:
