Lower Kootenai HUC8 17010104
A 9,700 km² sub-basin of the Pacific Northwest region in CN, ID, MT. 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
55
Moderate
Drought index
295
Severe
Area in D2+
94.69%
0% exceptional (D4)
Gauges below normal
25%
of 4 reporting
Median flow
86%
p33 of record
Water assets
574
10 springs · 241 wells
USGS gauges (5)
- KOOTENAI RIVER AT PORTHILL ID123220006,100 cfsp9 · much below normal
- KOOTENAI RIVER AT LEONIA, ID123050007,160 cfsp30 · normal
- KOOTENAI RIVER BEL MOYIE RIVER NR BONNERS FERRY ID123080007,380 cfsp36 · normal
- BOUNDARY CREEK NR PORTHILL ID1232150025 cfsp41 · normal
- KOOTENAI RIVER TRIBAL HATCHERY NR BONNERS FERRY123101005,070 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 295 | 94.69 | 1/4 | p33 |
Top water assets
- 69Summit Creekriver
- 69Summit Creekriver
- 69Mission Creekriver
- 69Summit Creekriver
- 67Parker Creekriver
- 67Fall Creekriver
- 67Corn Creekriver
- 67Fall Creekriver
- 67Pine Creekriver
- 67Boundary Creekriver