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Lost HUC8 18010204

A 7,833 km² sub-basin of the California region in CA, OR. 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
65
Moderate
Drought index
200
Severe
Area in D2+
0.01%
0% exceptional (D4)
Gauges below normal
25%
of 4 reporting
Median flow
33%
p26 of record
Water assets
1,792
134 springs · 717 wells

USGS gauges (5)

Recent conditions

DateDSCID2+ %Gauges lowFlow pct
2026-09-072000.011/4p26

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