Stony Brook at Princeton NJ
USGS Site No: 01401000 • Stony Brook • Mercer County, NJ
Stony Brook at Princeton NJ on the Stony Brook is currently at 11 cfs (Normal — 54th percentile for this date) . Gage height: 1.55 ft.
Reading from
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 | 3 | |
| 25th | Low threshold | 6 | |
| 50th (Median) | Normal (median) | 9 | |
| 75th | High threshold | 17 | Today: 11 cfs |
| 95th | Very High threshold | 178 |
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 | 13 | — |
| May 28, 2026 | 17 | — |
| May 27, 2026 | 23 | — |
| May 26, 2026 | 35 | — |
| May 25, 2026 | 83 | — |
| May 24, 2026 | 195 | — |
| May 23, 2026 | 8 | — |
| May 22, 2026 | 7 | — |
| May 21, 2026 | 9 | — |
| May 20, 2026 | 8 | — |
| May 19, 2026 | 6 | — |
| May 18, 2026 | 5 | — |
| May 17, 2026 | 5 | — |
| May 16, 2026 | 6 | — |
| May 15, 2026 | 7 | — |
| Apr 21, 2026 | 10 | — |
| Apr 20, 2026 | 11 | — |
| Apr 19, 2026 | 11 | — |
| Apr 18, 2026 | 12 | — |
| Apr 17, 2026 | 14 | — |
| Apr 16, 2026 | 14 | — |
| Apr 15, 2026 | 16 | — |
| Apr 14, 2026 | 17 | — |
| Apr 13, 2026 | 18 | — |
| Apr 12, 2026 | 18 | — |
| Apr 11, 2026 | 21 | — |
| Apr 10, 2026 | 19 | — |
| Apr 9, 2026 | 20 | — |
| Apr 8, 2026 | 23 | — |
| Apr 7, 2026 | 31 | — |
Station Information
- USGS Site No
- 01401000
- State
- NJ
- County
- Mercer County
- Coordinates
- 40.3331, -74.6819
- Drainage Area
- 45 mi²
- Datum (ft)
- 61.4
- HUC Code
- 020301050302
Flood Stage Thresholds
- Action Stage
- 8.0 ft
- Flood Stage
- 9.0 ft
- Moderate Flood
- 11.0 ft
- Major Flood
- 14.0 ft
Currently 7.45 ft below flood stage.
Recent Extremes
- Max discharge
-
756 cfsMar 6, 2026
- Min discharge
-
2 cfsOct 7, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Neshanic River at Reaville NJNormal12.4 mi · 6 cfs
-
Holland Brook at Readington NJVery High15.8 mi · 31 cfs
-
South Branch Raritan River at Stanton NJVery Low19.2 mi · 48 cfs
-
Spruce Run at Clinton NJVery Low24.5 mi · 6 cfs
-
Passaic River Near Millington NJNormal25.3 mi · 27 cfs