Lake Marion HUC8 03050111
A 1,421 km² sub-basin of the South Atlantic-Gulf region in SC. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
47
Stressed
Drought index
270
Severe
Area in D2+
69.51%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
487
0 springs · 262 wells
USGS gauges (0)
No active discharge gauges in this sub-basin.
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-22 | 270 | 69.51 | — | — |
| 2026-10-21 | 270 | 69.51 | — | — |
| 2026-10-20 | 270 | 69.51 | — | — |
| 2026-10-19 | 270 | 69.51 | — | — |
| 2026-10-18 | 270 | 69.51 | — | — |
| 2026-10-17 | 270 | 69.51 | — | — |
| 2026-10-16 | 270 | 69.51 | — | — |
| 2026-10-15 | 295 | 95.49 | — | — |
| 2026-10-14 | 295 | 95.49 | — | — |
| 2026-10-13 | 295 | 95.49 | — | — |
| 2026-10-12 | 295 | 95.49 | — | — |
| 2026-10-11 | 295 | 95.49 | — | — |
| 2026-10-10 | 295 | 95.49 | — | — |
| 2026-10-09 | 295 | 95.49 | — | — |
Top water assets
- 66Santeereservoir
- 65Santee Riverriver
- 65Tawcaw Creekriver
- 65Jacks Creekriver
- 65Jacks Creekriver
- 65Santee Riverriver
- 65Santee Riverriver
- 65Halfway Swamp Creekriver
- 65Halfway Swamp Creekriver
- 65Big Branchriver