ZIP 63346 is served primarily by St. Charles County, MO — including O'Fallon. ZIP-level data is sparse — showing the St. Charles County aggregate. FEMA NRI rates wildfire risk here as Moderate.
Mar peaks. Dec dips. ZIP-level seasonality is sparse — this is the county aggregate.
Top 5 NFIRS incident types — county-level breakdown.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Gas leak (natural gas or LPG) | 327 | 17.0% | |
| 2 | Building fires | 193 | 10.1% | |
| 3 | Electrical wiring/equipment problem, other | 165 | 8.6% | |
| 4 | Carbon monoxide incident | 113 | 5.9% | |
| 5 | Power line down | 102 | 5.3% |
13 cities sit in St. Charles County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | O'Fallon | 91,825 | 0 | 0 | — |
| 2 | St. Charles | 70,687 | 0 | 0 | — |
| 3 | St. Peters | 57,692 | 0 | 0 | — |
| 4 | Wentzville | 44,584 | 281 | 27 | A |
| 5 | Lake St. Louis | 17,088 | 0 | 0 | — |
| 6 | Dardenne Prairie | 12,903 | 28 | 3 | A+ |
| 7 | Cottleville | 5,584 | 27 | 0 | A |
| 8 | Weldon Spring | 5,320 | 13 | 0 | A |
| 9 | St. Paul | 3,149 | 0 | 0 | — |
| 10 | Flint Hill | 1,041 | 1 | 0 | A |
| 11 | Foristell | 750 | 52 | 4 | C- |
| 12 | Josephville | 728 | 8 | 0 | B+ |
| 13 | West Alton | 513 | 16 | 6 | C+ |
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 St. Charles 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.