Mill River river
Total streamflow across the Mill River was last observed at 34 cfs, and is expected to yield approximately 68 acre-ft of water today; about 30% of normal. River levels are low and may signify a drought. 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 River At Northampton reporting a streamflow rate of 34.3 cfs. This is also the highest stage along the Mill River, with a gauge stage of 5.81 ft at this location. 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 streamflow levels
Daily aggregate streamflow across every monitored gauge along the Mill River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Mill River
All 3 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Mill River At Northampton
MA
USGS 01171500
|
34 | 5.81 | -8.3 | 32% | 4 | 7,280 | 205 |
|
Mill R Nr Hamden
CT
USGS 01196620
|
16 | 1.30 | -11.2 | 23% | 1 | 5,580 | 130 |
|
Mill R Nr Fairfield
CT
USGS 01208925
|
9 | 0.88 | 29.7 | 19% | 1 | 723 | 22 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Mill River
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. It has a rich history dating back to the early 18th century, when it was used to power mills and factories along its banks. The river's hydrology has been heavily impacted by human activities, including the construction of multiple dams and reservoirs for industrial and municipal use. Notable reservoirs include the Leeds Reservoir, the Williamsburg Reservoir, and the Hatfield Reservoir. The river also provides recreational opportunities, including fishing, kayaking, and hiking, and supports local agriculture through irrigation. Despite ongoing challenges related to water management and pollution, the Mill River remains an important natural resource for the region.
Recreation along the Mill River
Fishing access and paddle runs Snoflo tracks within the watershed.
Track the Mill River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Mill River
Where does the data for the Mill River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.