Shiawassee HUC8 04080203
A 3,278 km² sub-basin of the Great Lakes region in MI. 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
69
Moderate
Drought index
121
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
377%
p89 of record
Water assets
618
0 springs · 107 wells
USGS gauges (3)
- SHIAWASSEE RIVER NEAR FERGUS, MI04145000303 cfsp87 · above normal
- SHIAWASSEE RIVER AT OWOSSO, MI04144500398 cfsp91 · much above normal
- SWAN CREEK AT FROST ROAD NEAR FROST, MI0414578510 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 121 | 0 | 0/2 | p89 |
Top water assets
- 65Knoblock Lake Damreservoir
- 65Pool Fivereservoir
- 65Gratiot-Saginaw Sga Impoundment #1 Damreservoir
- 65Swan Creek At Frost Road Near Frost, Miriver
- 65Corunna Damreservoir
- 65Shiawassee River Near Fergus, Miriver
- 65Davisburg Trout Pond Damreservoir
- 65Holly Drainriver
- 65Shiawassee River At Owosso, Miriver
- 65Fenton Water Damreservoir