Susquehanna River at Marietta, PA
USGS Site No: 01576000 • Susquehanna River • Lancaster County, PA
Susquehanna River at Marietta, PA on the Susquehanna River is currently at 56,300 cfs (High — 87th percentile for this date) . Gage height: 38.72 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 | 4,570 | |
| 25th | Low threshold | 6,910 | |
| 50th (Median) | Normal (median) | 11,700 | |
| 75th | High threshold | 30,100 | |
| 95th | Very High threshold | 75,000 | Today: 56,300 cfs |
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 | 70,800 | — |
| May 27, 2026 | 62,500 | — |
| May 26, 2026 | 50,900 | — |
| May 25, 2026 | 47,700 | — |
| May 24, 2026 | 30,100 | — |
| May 23, 2026 | 25,800 | — |
| May 22, 2026 | 27,300 | — |
| May 21, 2026 | 27,700 | — |
| May 20, 2026 | 29,700 | — |
| May 19, 2026 | 32,600 | — |
| May 18, 2026 | 36,000 | — |
| May 17, 2026 | 38,000 | — |
| May 16, 2026 | 39,800 | — |
| May 15, 2026 | 39,700 | — |
| Apr 21, 2026 | 51,500 | — |
| Apr 20, 2026 | 45,700 | — |
| Apr 19, 2026 | 44,700 | — |
| Apr 18, 2026 | 39,100 | — |
| Apr 17, 2026 | 37,500 | — |
| Apr 16, 2026 | 38,700 | — |
| Apr 15, 2026 | 41,600 | — |
| Apr 14, 2026 | 45,600 | — |
| Apr 13, 2026 | 50,500 | — |
| Apr 12, 2026 | 56,300 | — |
| Apr 11, 2026 | 63,700 | — |
| Apr 10, 2026 | 73,800 | — |
| Apr 9, 2026 | 86,900 | — |
| Apr 8, 2026 | 104,000 | — |
| Apr 7, 2026 | 109,000 | — |
| Apr 6, 2026 | 111,000 | — |
Station Information
- USGS Site No
- 01576000
- State
- PA
- County
- Lancaster County
- Coordinates
- 40.0545, -76.5308
- Drainage Area
- 25,990 mi²
- Datum (ft)
- 200.6
- HUC Code
- 02050306
Flood Stage Thresholds
- Action Stage
- 44.0 ft
- Flood Stage
- 49.0 ft
- Moderate Flood
- 52.0 ft
- Major Flood
- 54.0 ft
Currently 10.28 ft below flood stage.
Recent Extremes
- Max discharge
-
172,000 cfsMay 9, 2025
- Min discharge
-
3,840 cfsSep 23, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Susquehanna River at Harrisburg, PAHigh23.3 mi · 50,000 cfs
-
Beetree Run at Bentley Springs, MDNormal27.4 mi · 9 cfs
-
Gunpowder Falls at Hoffmanville, MDNormal28.5 mi · 17 cfs
-
Deer Creek at Rocks, MDNormal30.1 mi · 81 cfs
-
Grave Run Near Beckleysville, MDNormal30.6 mi · 6 cfs