Raritan River Below Calco Dam at Bound Brook NJ
USGS Site No: 01403060 • Raritan River • Somerset County, NJ
Raritan River Below Calco Dam at Bound Brook NJ on the Raritan River is currently at 211 cfs (Normal — 26th percentile for this date) . Gage height: 16.81 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 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 | 158 | |
| 25th | Low threshold | 203 | |
| 50th (Median) | Normal (median) | 378 | Today: 211 cfs |
| 75th | High threshold | 884 | |
| 95th | Very High threshold | 6,140 |
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.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 29, 2026 | 243 | — |
| May 28, 2026 | 324 | — |
| May 27, 2026 | 484 | — |
| May 26, 2026 | 887 | — |
| May 25, 2026 | 1,770 | — |
| May 24, 2026 | 1,500 | — |
| May 23, 2026 | 199 | — |
| May 22, 2026 | 215 | — |
| May 21, 2026 | 284 | — |
| May 20, 2026 | 147 | — |
| May 19, 2026 | 139 | — |
| May 18, 2026 | 126 | — |
| May 17, 2026 | 146 | — |
| May 16, 2026 | 161 | — |
| May 15, 2026 | 184 | — |
| Apr 21, 2026 | 201 | — |
| Apr 20, 2026 | 209 | — |
| Apr 19, 2026 | 224 | — |
| Apr 18, 2026 | 241 | — |
| Apr 17, 2026 | 259 | — |
| Apr 16, 2026 | 281 | — |
| Apr 15, 2026 | 273 | — |
| Apr 14, 2026 | 313 | — |
| Apr 13, 2026 | 314 | — |
| Apr 12, 2026 | 339 | — |
| Apr 11, 2026 | 370 | — |
| Apr 10, 2026 | 362 | — |
| Apr 9, 2026 | 378 | — |
| Apr 8, 2026 | 431 | — |
| Apr 7, 2026 | 535 | — |
Station Information
- USGS Site No
- 01403060
- State
- NJ
- County
- Somerset County
- Coordinates
- 40.5511, -74.5483
- Drainage Area
- 785 mi²
- Datum (ft)
- -1.1
- HUC Code
- 020301050506
Flood Stage Thresholds
- Action Stage
- 26.0 ft
- Flood Stage
- 28.0 ft
- Moderate Flood
- 30.0 ft
- Major Flood
- 33.0 ft
Currently 11.19 ft below flood stage.
Recent Extremes
- Max discharge
-
10,100 cfsMar 6, 2026
- Min discharge
-
109 cfsFeb 9, 2026
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Passaic River Near Millington NJNormal9.0 mi · 27 cfs
-
Robinsons Branch at Rahway NJNormal13.6 mi · 7 cfs
-
Robinsons Branch at Maple Ave at Rahway NJLow13.9 mi · 1 cfs
-
Rahway River at Rahway NJNormal14.7 mi · 17 cfs
-
Passaic River Near Chatham NJNormal14.7 mi · 68 cfs