Vermillion HUC8 10170102
A 5,488 km² sub-basin of the Missouri region in SD. 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
33
Stressed
Drought index
274
Severe
Area in D2+
73.68%
0% exceptional (D4)
Gauges below normal
100%
of 2 reporting
Median flow
15%
p7 of record
Water assets
5,697
14 springs · 4,631 wells
USGS gauges (3)
- EAST FORK VERMILLION RIVER NEAR PARKER, SD064786003 cfsp6 · much below normal
- VERMILLION RIVER NEAR VERMILLION,SD064790106 cfsp7 · much below normal
- WEST FORK VERMILLION RIVER NEAR PARKER, SD06478690no readingno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 274 | 73.68 | 2/2 | p7 |
Top water assets
- 76Vernon J Hoferwell
- 76Freeburg Limited Partnershipwell
- 76Patti Bancroftwell
- 76Glyndon Knutsonwell
- 76City Of Montrosewell
- 76Lowell G Andersenwell
- 76Tm Rural Water Districtwell
- 76Brian D Smitwell
- 76Lowell Hartwickwell
- 76Burl Litzelmanwell