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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.
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USGS Water-Year Summary 2024
404751073240903 S 16874. 3
Northern Atlantic Coastal Plain aquifer system
Glacial Aquifer, Upper
Glacial Aquifer, Upper
LOCATION - Lat 40°47'51.0", long 73°24'08.1" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, northeast corner of East Neck Road. Entrance to The Greens at Half Hollow.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 87.2 ft. Upper casing diameter 2 in; top of first opening 77.2 ft, bottom of last opening 82.2 ft.
DATUM - Land-surface datum is 138 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 0.20 ft below land-surface datum, 137.8 ft above land-surface datum, Jan. 7, 2003 to present.
PERIOD OF RECORD - January 2003 to current year.
GAGE - Water-level recorder installed August 2014; 15-minute recording interval. Periodic manual measurements by USGS personnel.
EXTREMES FOR PERIOD OF RECORD - Highest water level measured, 81.39 ft above NGVD of 1929, Apr. 23, 2010; lowest recorded 68.34 ft above NGVD of 1929, Oct. 24, 2017.
