Mill River in Massachusetts
Around here
Around Mill River
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Mill River is a 21.4 mile river. Streamflow is measured at the USGS gauge Mill River at Northampton, MA (site 01171500). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1939 to 2026
Mill River typically runs highest in April, at a median 175 cfs, and lowest in September, at 17 cfs. The highest flow on record for any single day is 3,870 cfs, in 1955.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 71 | 46 to 106 |
| February | 71 | 49 to 115 |
| March | 133 | 89 to 213 |
| April | 175 | 105 to 261 |
| May | 94 | 62 to 150 |
| June | 53 | 30 to 90 |
| July | 25 | 16 to 44 |
| August | 18 | 12 to 35 |
| September | 17 | 11 to 34 |
| October | 29 | 16 to 59 |
| November | 55 | 30 to 105 |
| December | 78 | 44 to 128 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 88 years of record. Statistics published by the US Geological Survey for Mill River at Northampton, MA (site 01171500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Mill River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
