Ramapo River Near Mahwah NJ
USGS Site No: 01387500 • Ramapo River • Bergen County, NJ
Ramapo River Near Mahwah NJ on the Ramapo River is currently at 91 cfs (Normal — 46th percentile for this date) . Gage height: 2.90 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 | 40 | |
| 25th | Low threshold | 59 | |
| 50th (Median) | Normal (median) | 98 | Today: 91 cfs |
| 75th | High threshold | 189 | |
| 95th | Very High threshold | 371 |
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 | 113 | — |
| May 27, 2026 | 137 | — |
| May 26, 2026 | 184 | — |
| May 25, 2026 | 243 | — |
| May 24, 2026 | 235 | — |
| May 23, 2026 | 89 | — |
| May 22, 2026 | 68 | — |
| May 21, 2026 | 72 | — |
| May 20, 2026 | 75 | — |
| May 19, 2026 | 68 | — |
| May 18, 2026 | 71 | — |
| May 17, 2026 | 73 | — |
| May 16, 2026 | 80 | — |
| May 15, 2026 | 86 | — |
| Apr 21, 2026 | 85 | — |
| Apr 20, 2026 | 93 | — |
| Apr 19, 2026 | 90 | — |
| Apr 18, 2026 | 97 | — |
| Apr 17, 2026 | 102 | — |
| Apr 16, 2026 | 98 | — |
| Apr 15, 2026 | 98 | — |
| Apr 14, 2026 | 97 | — |
| Apr 13, 2026 | 94 | — |
| Apr 12, 2026 | 97 | — |
| Apr 11, 2026 | 107 | — |
| Apr 10, 2026 | 109 | — |
| Apr 9, 2026 | 113 | — |
| Apr 8, 2026 | 124 | — |
| Apr 7, 2026 | 138 | — |
| Apr 6, 2026 | 163 | — |
Station Information
- USGS Site No
- 01387500
- State
- NJ
- County
- Bergen County
- Coordinates
- 41.0981, -74.1628
- Drainage Area
- 120 mi²
- Datum (ft)
- 253.1
- HUC Code
- 02030103
Flood Stage Thresholds
- Action Stage
- 7.5 ft
- Flood Stage
- 8.0 ft
- Moderate Flood
- 9.0 ft
- Major Flood
- 12.0 ft
Currently 5.10 ft below flood stage.
Recent Extremes
- Max discharge
-
1,660 cfsMay 10, 2025
- Min discharge
-
13 cfsJul 30, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Cupsaw Bk Near Wanaque NJUnknown4.9 mi
- Unknown
-
Ringwood Creek Near Wanaque NJNormal5.7 mi · 12 cfs
-
Wanaque River at Monks NJNormal7.2 mi · 25 cfs
-
Pascack Brook at Park Ridge NJLow7.7 mi · 8 cfs