Upper St. Croix HUC8 07030001
A 5,247 km² sub-basin of the Upper Mississippi region in MN, WI. 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
26
Critical
Drought index
381
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
54%
p8 of record
Water assets
3,030
6 springs · 2,252 wells
USGS gauges (1)
- ST. CROIX RIVER NEAR DANBURY, WI05333500509 cfsp8 · much below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 381 | 100 | 1/1 | p8 |
Top water assets
- 66Clam Riverreservoir
- 66Clam Fallsreservoir
- 65Lake Claytonreservoir
- 65Loon Lakereservoir
- 65Harth F Pondreservoir
- 65Godfrey Lakereservoir
- 65Danburyreservoir
- 65Saint Croixreservoir
- 65Olson Meadows Flowagereservoir
- 65Minervareservoir