USGS Water-Year Summary 2023
404932073055902 S 33380. 1
Northern Atlantic Coastal Plain aquifer system
Magothy Aquifer
LOCATION - Lat 40°49'32", long 73°05'59" referenced to North American Datum of 1927, Suffolk County, NY, Hydrologic Unit 02030202, at Duncan Avenue and Portion Road, in pumping center, in recorder shelter, Lake Ronkonkoma.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 855 ft. Upper casing diameter 4 in; top of first opening 840 ft, bottom of last opening 850 ft. Datum of gage is NGVD of 1929.
PERIOD OF RECORD - October 1968 to current year. Unpublished records for October 1968 to September 1975 are available in files of the U.S. Geological Survey.
GAGE - Water-level recorder installed August 1986; 15-minute recording interval. Periodic manual measurements made by USGS personnel.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 54.81 ft above NGVD 29, May 14 and 15, 2010; lowest recorded, 43.06 ft above NGVD 29, August 28, 2017.