Swan Creek at Swan Creek, MD
USGS Site No: 01580700 • Swan Creek • Harford County, MD
Swan Creek at Swan Creek, MD on the Swan Creek is currently at 6 cfs (Normal — 41th percentile for this date) . Gage height: 2.97 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 | 2 | |
| 25th | Low threshold | 3 | |
| 50th (Median) | Normal (median) | 8 | Today: 6 cfs |
| 75th | High threshold | 26 | |
| 95th | Very High threshold | 0 |
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 | 12 | — |
| May 27, 2026 | 15 | — |
| May 26, 2026 | 15 | — |
| May 25, 2026 | 28 | — |
| May 24, 2026 | 183 | — |
| May 23, 2026 | 52 | — |
| May 22, 2026 | 8 | — |
| May 21, 2026 | 9 | — |
| May 20, 2026 | 6 | — |
| May 19, 2026 | 2 | — |
| May 18, 2026 | 3 | — |
| May 17, 2026 | 3 | — |
| May 16, 2026 | 3 | — |
| May 15, 2026 | 4 | — |
| Apr 21, 2026 | 5 | — |
| Apr 20, 2026 | 6 | — |
| Apr 19, 2026 | 6 | — |
| Apr 18, 2026 | 6 | — |
| Apr 17, 2026 | 6 | — |
| Apr 16, 2026 | 7 | — |
| Apr 15, 2026 | 9 | — |
| Apr 14, 2026 | 8 | — |
| Apr 13, 2026 | 8 | — |
| Apr 12, 2026 | 8 | — |
| Apr 11, 2026 | 9 | — |
| Apr 10, 2026 | 9 | — |
| Apr 9, 2026 | 10 | — |
| Apr 8, 2026 | 10 | — |
| Apr 7, 2026 | 13 | — |
| Apr 6, 2026 | 23 | — |
Station Information
- USGS Site No
- 01580700
- State
- MD
- County
- Harford County
- Coordinates
- 39.5226, -76.1423
- Drainage Area
- 13 mi²
- Datum (ft)
- 21.0
- HUC Code
- 020600030201
Flood Stage Thresholds
- Action Stage
- 12.0 ft
- Flood Stage
- 14.0 ft
- Moderate Flood
- 18.0 ft
- Major Flood
- 20.0 ft
Currently 11.03 ft below flood stage.
Recent Extremes
- Max discharge
-
314 cfsMay 28, 2025
- Min discharge
-
2 cfsOct 25, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
James Run Near Belcamp, MDNormal6.6 mi · 6 cfs
-
Deer Creek Near Darlington, MDLow7.1 mi · 138 cfs
-
Bynum Run Near Abingdon, MDVery High7.9 mi · 15 cfs
-
Susquehanna River at Conowingo, MDHigh9.5 mi · 66,400 cfs
-
Bynum Run at Bel Air, MDNormal10.1 mi · 6 cfs