Mill River at Northampton, MA

USGS Site No: 01171500 • Mill River • Hampshire County, MA

Mill River at Northampton, MA on the Mill River is currently at 35 cfs (Normal — 50th percentile for this date) . Gage height: 5.82 ft.

Reading from

35
CFS Discharge
5.82
Gage Height (ft)
Normal
Flow Condition
Normal
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 27 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile Label CFS Threshold Today's Flow
10th Very Low threshold 15
25th Low threshold 20
50th (Median) Normal (median) 35 Today: 35 cfs
75th High threshold 75
95th Very High threshold 202

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

855 428 0 cfs Apr 6 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 41 —
May 27, 2026 53 —
May 26, 2026 80 —
May 25, 2026 131 —
May 24, 2026 63 —
May 23, 2026 31 —
May 22, 2026 32 —
May 21, 2026 33 —
May 20, 2026 38 —
May 19, 2026 41 —
May 18, 2026 46 —
May 17, 2026 54 —
May 16, 2026 66 —
May 15, 2026 98 —
Apr 21, 2026 82 —
Apr 20, 2026 105 —
Apr 19, 2026 93 —
Apr 18, 2026 82 —
Apr 17, 2026 90 —
Apr 16, 2026 104 —
Apr 15, 2026 84 —
Apr 14, 2026 80 —
Apr 13, 2026 80 —
Apr 12, 2026 81 —
Apr 11, 2026 87 —
Apr 10, 2026 93 —
Apr 9, 2026 99 —
Apr 8, 2026 99 —
Apr 7, 2026 107 —
Apr 6, 2026 121 —

Station Information

USGS Site No
01171500
State
MA
Coordinates
42.3190, -72.6651
Drainage Area
53 mi²
Datum (ft)
169.3
HUC Code
01080201
View on USGS NWIS →

Flood Stage Thresholds

Action Stage
9.0 ft
Flood Stage
11.0 ft

Currently 5.18 ft below flood stage.

Recent Extremes

Max discharge
1,470 cfs
May 6, 2025
Min discharge
9 cfs
Sep 22, 2025
Days at flood stage
0

Computed from the local daily-values archive.

Nearby Gauges