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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
49
Stressed
Drought index
300
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
57%
of 7 reporting
Median flow
77%
p10 of record
Water assets
620
13 springs · 473 wells
USGS gauges (7)
- SNAKE RIVER NR MENAN ID130570001,820 cfsp10 · much below normal
- GREAT WESTERN SPILLBACK NR IDAHO FALLS ID130571320 cfsp10 · below normal
- WILLOW CREEK FLOODWAY CHANNEL NR UCON ID130585200 cfsp10 · below normal
- WILLOW CR FLOODWAY CHANNEL AT MOUTH NR ID FALLS ID130585290 cfsp10 · below normal
- SNAKE RIVER AB EAGLE ROCK NR IDAHO FALLS ID130571552,610 cfsp27 · normal
- SNAKE RIVER AT LORENZO ID13038500870 cfsp41 · normal
- DRY BED NR RIRIE ID130380001,310 cfsp50 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 300 | 100 | 4/7 | p10 |
| 2026-10-20 | 300 | 100 | 4/7 | p22 |
| 2026-10-19 | 300 | 100 | 4/7 | p20 |
| 2026-10-18 | 300 | 100 | 4/7 | p21 |
| 2026-10-17 | 300 | 100 | 3/7 | p26 |
| 2026-10-16 | 300 | 100 | 1/7 | p52 |
| 2026-10-15 | 400 | 100 | 1/7 | p35 |
| 2026-10-14 | 400 | 100 | 1/7 | p39 |
| 2026-10-13 | 400 | 100 | 1/7 | p34 |
| 2026-10-12 | 400 | 100 | 1/7 | p41 |
| 2026-10-11 | 400 | 100 | 2/7 | p42 |
| 2026-10-10 | 400 | 100 | 3/7 | p34 |
| 2026-10-09 | 400 | 100 | 3/7 | p29 |
| 2026-10-08 | 400 | 100 | 3/7 | p26 |
Top water assets
- 69Snake Riverriver
- 69Snake Riverriver
- 69Snake Riverriver
- 69Snake Riverriver
- 69Birch Creekriver
- 67Snake River At Lorenzo Idriver
- 67Snake Riverriver
- 67Snake River Ab Eagle Rock Nr Idaho Falls Idriver
- 67Snake Riverriver
- 67Dry Bed Nr Ririe Idriver