ZIP 57631 is served primarily by Walworth County, SD — including Mobridge. ZIP-level data is sparse — showing the Walworth County aggregate. FEMA NRI rates wildfire risk here as Very High.
Jul peaks. Feb dips. ZIP-level seasonality is sparse — this is the county aggregate.
Top 5 NFIRS incident types — county-level breakdown.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Power line down | 7 | 20.0% | |
| 2 | Fire, other | 4 | 11.4% | |
| 3 | Trash or rubbish fire, contained | 3 | 8.6% | |
| 4 | Passenger vehicle fire | 3 | 8.6% | |
| 5 | Grass fire | 3 | 8.6% |
2 cities sit in Walworth County. Click for the per-city NFIRS profile.
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
This ZIP doesn't have enough NFIRS coverage on its own (under 10 reported incidents across 2021–2025) to publish ZIP-level statistics, so we're showing the Walworth County aggregate above. NFIRS reporting is voluntary and many rural ZIPs roll up to broader county totals. The ZIP-to-county mapping uses SimpleMaps' uscities.zips dataset.