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 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
53
Moderate
Drought index
210
Severe
Area in D2+
12.1%
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 |
|---|---|---|---|---|
| 2026-09-07 | 210 | 12.1 | — | — |
Top water assets
- 66Santeereservoir
- 65Santee Riverriver
- 65Tawcaw Creekriver
- 65Jacks Creekriver
- 65Jacks Creekriver
- 65Santee Riverriver
- 65Santee Riverriver
- 65Halfway Swamp Creekriver
- 65Halfway Swamp Creekriver
- 65Big Branchriver