USGS Water-Year Summary 2021
01096000 SQUANNACOOK RIVER NEAR WEST GROTON, MA
LOCATION - Lat 42°38'03", long 71°39'30" referenced to North American Datum of 1927, Middlesex County, MA, Hydrologic Unit 01070004, on left bank 0.7 mi downstream from Trout Brook and 2.7 mi northwest of West Groton.
DRAINAGE AREA - 65.9 mi² of which 2.20 mi² probably is noncontributing. net above gage is 63.7 mi².
- WDR MA-RI-84-1: Drainage area.
PERIOD OF RECORD - Discharge: October 1949 to current year. Water-quality records: water year 1957.
GAGE - Data Collection Platform with satellite telemeter. Datum of gage is 243.50 ft above NAVD 1988. Prior to May 13, 2020, datum of gage reported as 244.27 ft above NGVD 1929.
COOPERATION - Massachusetts Department of Conservation and Recreation, Office of Water Resources.
PERIOD OF RECORD - Water-quality records: Water year 1957.