North Branch Raritan River Near Raritan NJ
USGS Site No: 01400000 • North Branch Raritan River • Somerset County, NJ
North Branch Raritan River Near Raritan NJ on the North Branch Raritan River is currently at 119 cfs (Normal — 48th percentile for this date) . Gage height: 2.77 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 | 50 | |
| 25th | Low threshold | 73 | |
| 50th (Median) | Normal (median) | 123 | Today: 119 cfs |
| 75th | High threshold | 263 | |
| 95th | Very High threshold | 1,360 |
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 28, 2026 | 133 | — |
| May 27, 2026 | 145 | — |
| May 26, 2026 | 191 | — |
| May 25, 2026 | 293 | — |
| May 24, 2026 | 464 | — |
| May 23, 2026 | 101 | — |
| May 22, 2026 | 108 | — |
| May 21, 2026 | 115 | — |
| May 20, 2026 | 102 | — |
| May 19, 2026 | 96 | — |
| May 18, 2026 | 102 | — |
| May 17, 2026 | 108 | — |
| May 16, 2026 | 111 | — |
| May 15, 2026 | 117 | — |
| Apr 21, 2026 | 122 | — |
| Apr 20, 2026 | 129 | — |
| Apr 19, 2026 | 131 | — |
| Apr 18, 2026 | 135 | — |
| Apr 17, 2026 | 141 | — |
| Apr 16, 2026 | 148 | — |
| Apr 15, 2026 | 150 | — |
| Apr 14, 2026 | 151 | — |
| Apr 13, 2026 | 153 | — |
| Apr 12, 2026 | 156 | — |
| Apr 11, 2026 | 165 | — |
| Apr 10, 2026 | 168 | — |
| Apr 9, 2026 | 171 | — |
| Apr 8, 2026 | 178 | — |
| Apr 7, 2026 | 195 | — |
| Apr 6, 2026 | 231 | — |
Station Information
- USGS Site No
- 01400000
- State
- NJ
- County
- Somerset County
- Coordinates
- 40.5706, -74.6792
- Drainage Area
- 190 mi²
- Datum (ft)
- 49.6
- HUC Code
- 020301050206
Flood Stage Thresholds
- Action Stage
- 8.0 ft
- Flood Stage
- 10.0 ft
- Moderate Flood
- 12.0 ft
- Major Flood
- 15.0 ft
Currently 7.23 ft below flood stage.
Recent Extremes
- Max discharge
-
3,180 cfsMay 31, 2025
- Min discharge
-
47 cfsAug 27, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Passaic River Near Millington NJNormal10.9 mi · 27 cfs
-
South Branch Raritan River Near High Bridge NJNormal12.8 mi · 46 cfs
-
South Branch Raritan River at Four Bridges NJLow16.6 mi · 16 cfs
-
Passaic River Near Chatham NJNormal18.6 mi · 68 cfs
-
Whippany River Near Morristown NJNormal18.9 mi · 9 cfs