South Santiam HUC8 17090006
A 2,697 km² sub-basin of the Pacific Northwest region in OR. 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
42
Stressed
Drought index
311
Extreme
Area in D2+
99.87%
0% exceptional (D4)
Gauges below normal
86%
of 7 reporting
Median flow
28%
p10 of record
Water assets
430
15 springs · 207 wells
USGS gauges (12)
- THOMAS CREEK NEAR SCIO, OR1418880010 cfsp5 · much below normal
- QUARTZVILLE CREEK NEAR CASCADIA, OR1418590015 cfsp6 · much below normal
- SOUTH SANTIAM RIVER BELOW CASCADIA, OR1418500031 cfsp8 · much below normal
- SCHAFER CREEK NEAR LACOMB, OR141886100 cfsp10 · below normal
- WILEY CREEK NEAR FOSTER, OR141870007 cfsp11 · below normal
- SOUTH SANTIAM RIVER NEAR FOSTER, OR141872001,140 cfsp24 · below normal
- SOUTH SANTIAM RIVER AT WATERLOO, OR141875001,160 cfsp46 · normal
- SOUTH SANTIAM RIVER AT UPPER SODA, OR1418430010 cfsno long-term record
- MIDDLE SANTIAM RIVER NR SANTIAM JUNCTION, OR141856007 cfsno long-term record
- QUARTZVILLE CREEK BLW GALENA CREEK NR CASCADIA, OR141858656 cfsno long-term record
- LEBANON SANTIAM CANAL NEAR LEBANON, OR1418760075 cfsno long-term record
- CRABTREE CREEK NEAR SCIO, OR1418875028 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 311 | 99.87 | 6/7 | p10 |
| 2026-10-19 | 311 | 99.87 | 6/7 | p10 |
| 2026-10-18 | 311 | 99.87 | 5/7 | p9 |
| 2026-10-17 | 311 | 99.87 | 5/7 | p10 |
| 2026-10-16 | 311 | 99.87 | 5/7 | p11 |
| 2026-10-15 | 311 | 99.87 | 5/7 | p12 |
| 2026-10-14 | 311 | 99.87 | 5/7 | p13 |
| 2026-10-13 | 311 | 99.87 | 5/7 | p15 |
| 2026-10-12 | 311 | 99.87 | 4/7 | p17 |
| 2026-10-11 | 311 | 99.87 | 4/7 | p18 |
| 2026-10-10 | 311 | 99.87 | 4/7 | p17 |
| 2026-10-09 | 311 | 99.87 | 4/8 | p22 |
| 2026-10-08 | 311 | 99.87 | 4/8 | p24 |
| 2026-10-07 | 311 | 99.87 | 4/8 | p22 |
Top water assets
- 76Mill Creek — Industrial/Manufacturing Usesspring
- 73Well 2 — Irrigationwell
- 73Well 1 — Irrigationwell
- 73A Well — Irrigationwell
- 73A Well — Irrigationwell
- 73Well 1 — Irrigationwell
- 73South Santiam River — Irrigationspring
- 73A Well — Irrigationwell
- 73Well 1 — Irrigationwell
- 73Well 3 — Irrigationwell