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Upper Gila-San Carlos Reservoir HUC8 15040005

A 7,172 km² sub-basin of the Lower Colorado region in AZ. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.

Health score
68
Moderate
Drought index
168
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 5 reporting
Median flow
247%
p71 of record
Water assets
4,806
166 springs · 2,074 wells

USGS gauges (6)

Recent conditions

DateDSCID2+ %Gauges lowFlow pct
2026-10-2116800/5p71
2026-10-2016800/5p63
2026-10-1916800/5p59
2026-10-1816800/5p60
2026-10-1716800/5p61
2026-10-1616800/5p66
2026-10-1516800/5p74
2026-10-1416800/5p76
2026-10-1316801/5p76
2026-10-1216801/5p77
2026-10-1116801/5p77
2026-10-1016800/5p77
2026-10-0916800/5p82
2026-10-0820220.280/5p78

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