USGS Water-Year Summary 2021
404505073131501 S123414. 1
Northern Atlantic Coastal Plain aquifer system
Glacial Aquifer, Upper
LOCATION - Lat 40°45'05", long 73°13'15" referenced to North American Datum of 1927, Suffolk County, NY, Hydrologic Unit 02030202, at east end of 41st Street, just east of Broadway, Islip.
WELL CHARACTERISTICS - Depth 30 ft. Upper casing diameter 2 in; top of first opening 15 ft, bottom of last opening 25 ft. Datum of gage is NGVD of 1929.
PERIOD OF RECORD - April 2005 to current year.
GAGE - Water-level recorder installed on April 2005; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 26.57 ft above NGVD 29, October 17, 2005; lowest recorded, 22.22 ft above NGVD 29, September 1, 2016.