Stony Brook Reservoir at Dam Near Waltham, MA

USGS Site No: 01104480 • Stony Brook Reservoir • Middlesex County, MA

Stony Brook Reservoir at Dam Near Waltham, MA on the Stony Brook Reservoir is currently at 0 cfs (Very Low — 1th percentile for this date) . Gage height: 0.66 ft.

Reading from

0
CFS Discharge
0.66
Gage Height (ft)
Very Low
Flow Condition
N/A
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 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 0 Today: 0 cfs
25th Low threshold 0
50th (Median) Normal (median) 0
75th High threshold 27
95th Very High threshold 191

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.

275 138 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 0 —
May 27, 2026 0 —
May 26, 2026 0 —
May 25, 2026 0 —
May 24, 2026 0 —
May 23, 2026 0 —
May 22, 2026 0 —
May 21, 2026 0 —
May 20, 2026 0 —
May 19, 2026 0 —
May 18, 2026 0 —
May 17, 2026 0 —
May 16, 2026 0 —
May 15, 2026 0 —
Apr 21, 2026 6 —
Apr 20, 2026 6 —
Apr 19, 2026 7 —
Apr 18, 2026 8 —
Apr 17, 2026 10 —
Apr 16, 2026 5 —
Apr 15, 2026 0 —
Apr 14, 2026 0 —
Apr 13, 2026 0 —
Apr 12, 2026 0 —
Apr 11, 2026 2 —
Apr 10, 2026 4 —
Apr 9, 2026 6 —
Apr 8, 2026 1 —
Apr 7, 2026 0 —
Apr 6, 2026 0 —

Station Information

USGS Site No
01104480
State
MA
County
Middlesex County
Coordinates
42.3557, -71.2651
Drainage Area
24 mi²
Datum (ft)
42.1
HUC Code
01090001
View on USGS NWIS →

Recent Extremes

Max discharge
130 cfs
May 23, 2025
Min discharge
0 cfs
Nov 18, 2025

Computed from the local daily-values archive.

Nearby Gauges

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