Mill River River Levels

Last Updated: December 4, 2025

The Mill River is a 15-mile-long river in western Massachusetts, originating in the town of Williamsburg and flowing into the Connecticut River in Northampton.


Summary

Total streamflow across the Mill River was last observed at 133 cfs, and is expected to yield approximately 263 acre-ft of water today; about 117% of normal. Average streamflow for this time of year is 113 cfs, with recent peaks last observed on 2019-03-01 when daily discharge volume was observed at 7,280 cfs.

Maximum discharge along the river is currently at the Mill R Nr Fairfield reporting a streamflow rate of 81.7 cfs. However, the streamgauge with the highest stage along the river is the Mill River At Northampton with a gauge stage of 6 ft. This river is monitored from 3 different streamgauging stations along the Mill River, the highest being situated at an altitude of 205 ft, the Mill River At Northampton.

River Details

Last Updated 2025-12-04
Discharge Volume 263 ACRE-FT
Streamflow 132.5 cfs
-113.7 cfs (-46.18%)
Percent of Normal 117.47%
Maximum 7,280.0 cfs
2019-03-01
Seasonal Avg 113 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Mill River At Northampton
USGS 01171500
51 cfs 6 ft -5.4
Mill R Nr Hamden
USGS 01196620
30 cfs 1.43 ft -48.38
Mill R Nr Fairfield
USGS 01208925
82 cfs 1.54 ft -39.03
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Saw Mill River Parkway (also known as the Saw Mill Parkway or the Saw Mill) is a north–south parkway that extends for 28.93 miles (46.56 km) through Westchester County, New York, in the United States. It begins at the border between Westchester County and the Bronx, as the continuation of the Henry Hudson Parkway leaving New York City, and heads generally northeastward to an interchange with Interstate 684 (I-684) and New York State Route 35 (NY 35). At its north end, the parkway serves as a collector/distributor road for both highways as it passes east of the hamlet of Katonah. The parkway is named for the Saw Mill River, which the highway parallels for most of its length.
The Saw Mill serves as an important connection from the Taconic State and Sprain Brook parkways to the Tappan Zee Bridge and New York State Thruway. It is not a limited-access highway as several of its exits are signalized at-grade intersections. The Saw Mill River Parkway is inventoried by the New York State Department of Transportation (NYSDOT) as New York State Route 987D (NY 987D), an unsigned reference route designation.