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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
404753073440303 N 4266. 2
Northern Atlantic Coastal Plain aquifer system
Lloyd Aquifer
Lloyd Aquifer
LOCATION - Lat 40°47'52", long 73°44'03" referenced to North American Datum of 1927, Nassau County, NY, Hydrologic Unit 02030201, at south side of Piccadilly Road, 390 ft east of Middle Neck Road, Great Neck.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 396 ft. Upper casing diameter 10 in; top of first opening 377 ft, bottom of last opening 393 ft.
PERIOD OF RECORD - December 1954 to December 1958, September 1961 to September 1971, April 1974, November 1977 to October 1983, January 1985, January 1987, February 1988 to December 1988, and March 1990 to February 2021 (discontinued).
GAGE - Water-level recorder installed August 2002; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 22.22 ft above sea level, Feb. 7, 2020; lowest measured, 9.43 ft below sea level, Sept. 9, 1983.
