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Water-Year Summary for Site 404210073340801

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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.
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Available Parameters
62610 Elevation, GW, NGVD29(Mean)  
62611 Elevation, GW, NAVD88(Mean)  

Water year 2025: 2025-10-01 to 2026-09-30
 
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USGS Water-Year Summary 2025
404210073340801 N 1615. 4
Northern Atlantic Coastal Plain aquifer system
Glacial Aquifer, Upper
LOCATION - Lat 40°42'11.1", long 73°34'06.9" referenced to North American Datum of 1983, Nassau County, NY, Hydrologic Unit 02030202, at south side of Van Buren Avenue, 34 ft west of Merrick Avenue, Freeport.
REVISIONS HISTORY - Groundwater levels for the period July 7, 2020 to Sept. 9, 2020, were deleted on Apr. 22, 2025, because of an equipment malfunction.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 33 ft. Upper casing diameter 1.25 in; top of first opening 30 ft, bottom of last opening 33 ft. Datum of gage is NGVD of 1929.
DATUM - Land-surface datum is 59.84 ft above North American Vertical Datum of 1988. Measuring point: Top of coupling, 0.27 ft below land-surface datum, 60.73 ft above National Geodetic Vertical Datum of 1929, Nov. 10, 1992 to Jun. 24, 2015; Top of 2 in. PVC casing, 60.64 ft above National Geodetic Vertical Datum of 1929, Jun. 23, 2015 to present.  
PERIOD OF RECORD - October 1989 to current year.
GAGE - Water-level recorder installed October 2002 to October 2024; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
REMARKS - Replaced well N1615.3 in October 1989 near same location. Cellular water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 44.07 ft above NGVD of 1929, Apr. 7, 2010; lowest measured, 32.74 ft above NGVD of 1929, Aug. 23, 2002.