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Lower San Juan-Four Corners HUC8 14080201

A 5,165 km² sub-basin of the Upper Colorado region in AZ, CO, NM, UT. 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
53
Moderate
Drought index
313
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
93%
p26 of record
Water assets
1,792
106 springs · 523 wells

USGS gauges (2)

Recent conditions

DateDSCID2+ %Gauges lowFlow pct
2026-09-073131001/2p26

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