Elm HUC8 10160004
A 4,010 km² sub-basin of the Missouri region in ND, SD. 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
71
Moderate
Drought index
66
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
288%
p89 of record
Water assets
1,595
0 springs · 737 wells
USGS gauges (2)
- ELM RIVER AT WESTPORT, SD0647150017 cfsp82 · above normal
- MAPLE RIVER AT ND-SD STATE LINE0647120011 cfsp95 · much above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 66 | 0 | 0/2 | p89 |
Top water assets
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