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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
404124073394901 N 1129. 3
Northern Atlantic Coastal Plain aquifer system
Glacial Aquifer, Upper
Glacial Aquifer, Upper
LOCATION - Lat 40°41'24.6", long 73°39'47.2" referenced to North American Datum of 1983, Nassau County, NY, Hydrologic Unit 02030202, at west side of Euclid Avenue, 30 ft south of Hawthorne Street, West Hempstead.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 55 ft. Upper casing diameter 2 in; top of first opening 45 ft, bottom of last opening 50 ft. Datum of gage is NGVD of 1929.
DATUM - Land-surface datum is 49.45 ft above North American Vertical Datum of 1988. Measuring point: Last leveled with DGPS on 06-23-2015, 50.08 ft above land-surface datum, Oct. 2, 2002 to Mar. 22, 2016; unknown, 50.14 ft above land-surface datum, Mar. 22, 2016 to Feb. 8, 2019; Top of 2 inch PVC casing, north edge, 50.1 ft above land-surface datum, Feb. 8, 2019 to Oct. 23, 2023; Top of 2 inch PVC casing, north edge, 50.15 ft above land-surface datum, Oct. 23, 2023 to Aug. 8, 2024; Top of 2 inch PVC casing, north edge, 49.03 ft above land-surface datum, Aug. 8, 2024 to present.
PERIOD OF RECORD - October 2002 to current year.
GAGE - Water-level recorder installed October 2002 to September 2024; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
REMARKS - Replaced well N 1129. 2 in October 2002 near same location. Cellular water-level telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 30.96 ft above NAVD of 1988, July 23, 2019; lowest recorded, 22.38 ft above NAVD of 1988, Nov. 6, 2002.
