St. Marys HUC8 04200002
A 4,948 km² sub-basin of the Great Lakes region in CN, MI. Drought coverage is from the US Drought Monitor; streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
70
Moderate
Drought index
—
—
Area in D2+
—
Gauges below normal
0%
of 1 reporting
Median flow
86%
p31 of record
Water assets
4,660
0 springs · 3,947 wells
USGS gauges (1)
- ST. MARYS RIVER AT SAULT STE. MARIE, ONTARIO0412788572,900 cfsp31 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | — | — | 0/1 | p31 |
Top water assets
- 65Taylor Creekriver
- 65Armstrong No 2 Damreservoir
- 65Munuscong Bay Damreservoir
- 65South Creekriver
- 65Soo Locksreservoir
- 65St. Marys River At Sault Ste. Marie, Ontarioriver
- 65Campus Creekriver
- 65Bennett Creekriver
- 65Campus Creekriver
- 65Upper Echo Riverriver