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Au Sable HUC8 04070007

A 5,306 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
78
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 6 reporting
Median flow
128%
p78 of record
Water assets
3,308
4 springs · 2,686 wells

USGS gauges (9)

Recent conditions

DateDSCID2+ %Gauges lowFlow pct
2026-09-07000/6p78

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