ZIP 50457 is served primarily by Cerro Gordo County, IA — including Mason City. ZIP-level data is sparse — showing the Cerro Gordo County aggregate.
Jan 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 | Unauthorized burning | 78 | 23.6% | |
| 2 | Building fires | 44 | 13.3% | |
| 3 | Authorized controlled burning | 29 | 8.8% | |
| 4 | Gas leak (natural gas or LPG) | 23 | 7.0% | |
| 5 | Carbon monoxide incident | 18 | 5.5% |
4 cities sit in Cerro Gordo County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Mason City | 27,271 | 272 | 40 | B |
| 2 | Clear Lake | 7,642 | 18 | 2 | A- |
| 3 | Rockwell | 1,004 | 1 | 0 | A+ |
| 4 | Ventura | 638 | 25 | 1 | 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 Cerro Gordo 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.