Still River at Robertsville, CT

USGS Site No: 01186500Still River • Northwest Hills Planning Region, CT

Still River at Robertsville, CT on the Still River is currently at 66 cfs (Normal — 46th percentile for this date) . Gage height: 1.98 ft.

Reading from

66
CFS Discharge
1.98
Gage Height (ft)
Normal
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 34
25th Low threshold 48
50th (Median) Normal (median) 70 Today: 66 cfs
75th High threshold 146
95th Very High threshold 418

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.

1.7k 837 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 96 2.19
May 27, 2026 118 2.33
May 26, 2026 170 2.58
May 25, 2026 234 2.84
May 24, 2026 149 2.42
May 23, 2026 46 1.80
May 22, 2026 44 1.78
May 21, 2026 48 1.81
May 20, 2026 55 1.88
May 19, 2026 67 1.99
May 18, 2026 74 2.04
May 17, 2026 80 2.09
May 16, 2026 92 2.17
May 15, 2026 109 2.28
Apr 21, 2026 164 2.56
Apr 20, 2026 203 2.72
Apr 19, 2026 209 2.74
Apr 18, 2026 247 2.88
Apr 17, 2026 306 3.07
Apr 16, 2026 289 3.01
Apr 15, 2026 114 2.31
Apr 14, 2026 96 2.20
Apr 13, 2026 94 2.18
Apr 12, 2026 97 2.20
Apr 11, 2026 107 2.27
Apr 10, 2026 117 2.32
Apr 9, 2026 126 2.38
Apr 8, 2026 135 2.42
Apr 7, 2026 153 2.51
Apr 6, 2026 178 2.62

Station Information

USGS Site No
01186500
State
CT
Coordinates
41.9679, -73.0334
Drainage Area
85 mi²
Datum (ft)
509.6
HUC Code
010802070103
View on USGS NWIS →

Recent Extremes

Max discharge
1,760 cfs
May 6, 2025
Min discharge
8 cfs
Sep 23, 2025

Computed from the local daily-values archive.

Nearby Gauges