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Grand Canyon HUC8 15010002

A 6,608 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

66

Moderate

Drought index

151

Moderate

Area in D2+

0%

0% exceptional (D4)

Gauges below normal

25%

of 4 reporting

Median flow

110%

p51 of record

Water assets

1,190

239 springs · 16 wells

USGS gauges (6)

COLORADO RVR ABV DIAMOND CREEK NR PEACH SPRINGS AZ
094042008,410 cfsp10 · much below normal
HAVASU CREEK ABOVE THE MOUTH, NEAR SUPAI, AZ
0940411569 cfsp38 · normal
DIAMOND CREEK NEAR PEACH SPRINGS, AZ
094042084 cfsp65 · normal
PUMP HOUSE WASH SPRING NEAR GRAND CANYON, AZ
094030130 cfsp83 · above normal
HERMIT CREEK ABOVE TONTO TRAIL NR GRAND CANYON, AZ
094030432 cfsno long-term record
COLORADO R ABV NATIONAL CANYON NR SUPAI
0940412019,600 cfsno long-term record

Recent conditions

Date	DSCI	D2+ %	Gauges low	Flow pct
2026-10-21	151	0	1/4	p51
2026-10-20	151	0	1/4	p55
2026-10-19	151	0	2/4	p41
2026-10-18	151	0	2/4	p42
2026-10-17	151	0	2/4	p41
2026-10-16	151	0	2/4	p48
2026-10-15	198	0	2/4	p50
2026-10-14	198	0	1/4	p52
2026-10-13	198	0	1/4	p53
2026-10-12	198	0	2/4	p40
2026-10-11	198	0	2/4	p34
2026-10-10	198	0	2/4	p34
2026-10-09	198	0	2/4	p22
2026-10-08	203	2.89	2/4	p21

Top water assets

View on the map All Lower Colorado sub-basins