Rockaway River Below Reservoir at Boonton NJ
USGS Site No: 01381000 • Rockaway River • Morris County, NJ
Rockaway River Below Reservoir at Boonton NJ on the Rockaway River is currently at 42 cfs (Normal — 51th percentile for this date) . Gage height: 2.05 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 | 1 | |
| 25th | Low threshold | 10 | |
| 50th (Median) | Normal (median) | 38 | |
| 75th | High threshold | 135 | Today: 42 cfs |
| 95th | Very High threshold | 336 |
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 | 51 | — |
| May 28, 2026 | 77 | — |
| May 27, 2026 | 131 | — |
| May 26, 2026 | 215 | — |
| May 25, 2026 | 282 | — |
| May 24, 2026 | 90 | — |
| May 23, 2026 | 10 | — |
| May 22, 2026 | 9 | — |
| May 21, 2026 | 9 | — |
| May 20, 2026 | 10 | — |
| May 19, 2026 | 16 | — |
| May 18, 2026 | 16 | — |
| May 17, 2026 | 15 | — |
| May 16, 2026 | 26 | — |
| May 15, 2026 | 23 | — |
| Apr 21, 2026 | 33 | — |
| Apr 20, 2026 | 38 | — |
| Apr 19, 2026 | 47 | — |
| Apr 18, 2026 | 51 | — |
| Apr 17, 2026 | 47 | — |
| Apr 16, 2026 | 57 | — |
| Apr 15, 2026 | 57 | — |
| Apr 14, 2026 | 54 | — |
| Apr 13, 2026 | 61 | — |
| Apr 12, 2026 | 61 | — |
| Apr 11, 2026 | 70 | — |
| Apr 10, 2026 | 79 | — |
| Apr 9, 2026 | 88 | — |
| Apr 8, 2026 | 101 | — |
| Apr 7, 2026 | 123 | — |
Station Information
- USGS Site No
- 01381000
- State
- NJ
- County
- Morris County
- Coordinates
- 40.8969, -74.3947
- Drainage Area
- 119 mi²
- Datum (ft)
- 195.7
- HUC Code
- 02030103
Flood Stage Thresholds
- Action Stage
- 4.5 ft
- Flood Stage
- 5.0 ft
- Moderate Flood
- 7.0 ft
- Major Flood
- 8.0 ft
Currently 2.95 ft below flood stage.
Recent Extremes
- Max discharge
-
1,200 cfsJun 1, 2025
- Min discharge
-
9 cfsDec 18, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Rockaway River at Main Street at Boonton NJNormal1.5 mi · 102 cfs
-
Whippany River Near Pine Brook NJLow4.4 mi · 48 cfs
-
Passaic River at Pine Brook NJNormal4.5 mi · 290 cfs
-
Passaic River at I-80 at Singac NJLow6.7 mi · 483 cfs
-
Whippany River at Morristown NJLow7.0 mi · 26 cfs