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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
393558075375502 Dc53-85
Northern Atlantic Coastal Plain aquifer system
Potomac Group
Potomac Group
LOCATION - Lat 39°35'58.11", long 75°37'54.31" referenced to North American Datum of 1983, New Castle County, DE, Hydrologic Unit 02040205,
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 144.9 ft. Upper casing diameter 2 in; top of first opening 137 ft, bottom of last opening 142 ft. Drilled, observation well.
DATUM - Land-surface datum is 54.14 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of inner casing, 2.01 ft above land-surface datum, May 14, 2007 to present.
PERIOD OF RECORD - May 2007 to current year.
GAGE - Water Years 2014-2016: Records good.
Water-level measurements by U.S. Geological Survey personnel. Equipped with a digital water-level recorder - 15 minute recording interval, June 2007 to December 2016.
Water-level measurements by U.S. Geological Survey personnel. Equipped with a digital water-level recorder - 15 minute recording interval, June 2007 to December 2016.
REMARKS - Well PW-4D; USGS - Potomac Aquifer Study at Standard Chlorine, Delaware City. Missing data due to instrument removal during water quality sampling.
EXTREMES FOR PERIOD OF RECORD - Highest water-level measured, 3.02 ft above sea level, April 17, 2011 (recorder); lowest measured, -3.12 ft above sea level, December 8, 2008 (recorder). Lowest water level measured during 2010 aquifer pump test was -4.33 ft above sea level, August 31, 2010 (recorder).
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 144.9 ft. Upper casing diameter 2 in; top of first opening 137 ft, bottom of last opening 142 ft. Drilled, observation well.
DATUM - Land-surface datum is 54.14 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of inner casing, 2.01 ft above land-surface datum, May 14, 2007 to present.
PERIOD OF RECORD - Intermittent water-quality data collected August 2007 to current year.
