Squannacook River River Levels

Last Updated: December 4, 2025

The Squannacook River is a 16-mile-long river in northern Massachusetts.


Summary

Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Squannacook River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Squannacook River, the highest being situated at an altitude of ft, the .

       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Squannacook River Near West Groton
USGS 01096000
29 cfs 1.84 ft -6.15
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Squannacook River is a 16.4-mile-long (26.4 km) river in northern Massachusetts. It is a tributary of the Nashua River and part of the Merrimack River watershed flowing to the Atlantic Ocean.
The river rises within West Townsend, Massachusetts, at the juncture of Walker Brook, Locke Brook, and Willard Brook. Walker and Locke Brooks rise within Greenville, New Ipswich, and Mason, New Hampshire, while Willard Brook rises in Ashby, Massachusetts. The Squannacook flows east and southeast through Townsend and West Groton, Massachusetts, and joins the Nashua River in wetlands just east of Woodsville. The river is dammed three times in Townsend and twice in West Groton. Its watershed covers 73 square miles (190 km2), of which 18% is permanently protected. It has been designated an Outstanding Resource Water.
There has been a conversion of one of the former mills on the Groton portion of the river. The former E.H. Sampson Leather Board Mill became a senior citizen/ nursing home. Riverside is located next to West Groton Square.