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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
404832073333203 N 9059. 1
Northern Atlantic Coastal Plain aquifer system
Magothy Aquifer
Magothy Aquifer
LOCATION - Lat 40°48'32.5", long 73°33'28.9" referenced to North American Datum of 1983, Nassau County, NY, Hydrologic Unit 02030202, northwest corner of Fruitledge Road and Cedar Swamp Road (Rt. 107).
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 175 ft. Upper casing diameter 4 in; top of first opening 170 ft, bottom of last opening 175 ft.
DATUM - Land-surface datum is 228 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of 4 in PVC casing, 229.88 ft above land-surface datum, Oct. 31, 1974 to May. 5, 2021; Top of 4 in PVC casing, 228.68 ft above land-surface datum, May. 5, 2021 to present.
PERIOD OF RECORD - October 1974 to April 1984, March 1990 to January 2000, March 2005 to current year.
GAGE - Water-level recorder installed June 2016; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD - Highest water level measured, 90.84 ft above NGVD of 1929, Dec. 5, 1979; lowest measured, 73.82 ft above NGVD of 1929, Mar. 20, 1996.
