Idaho Falls HUC8 17040201
A 1,413 km² sub-basin of the Pacific Northwest region in ID. 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
48
Stressed
Drought index
400
Exceptional
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
29%
of 7 reporting
Median flow
92%
p37 of record
Water assets
620
13 springs · 473 wells
USGS gauges (7)
- DRY BED NR RIRIE ID130380001,940 cfsp22 · below normal
- GREAT WESTERN SPILLBACK NR IDAHO FALLS ID13057132105 cfsp24 · below normal
- SNAKE RIVER NR MENAN ID130570005,430 cfsp31 · normal
- SNAKE RIVER AT LORENZO ID130385003,580 cfsp37 · normal
- SNAKE RIVER AB EAGLE ROCK NR IDAHO FALLS ID130571555,190 cfsp41 · normal
- WILLOW CREEK FLOODWAY CHANNEL NR UCON ID13058520417 cfsp88 · above normal
- WILLOW CR FLOODWAY CHANNEL AT MOUTH NR ID FALLS ID13058529347 cfsp88 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 400 | 100 | 2/7 | p37 |
Top water assets
- 69Snake Riverriver
- 69Birch Creekriver
- 69Snake Riverriver
- 69Snake Riverriver
- 69Snake Riverriver
- 67Snake River At Lorenzo Idriver
- 67Snake Riverriver
- 67Snake Riverriver
- 67Snake River Ab Eagle Rock Nr Idaho Falls Idriver
- 67Snake Riverriver