ZIP 21018 is served primarily by Harford County, MD — including Bel Air South. ZIP-level data is sparse — showing the Harford County aggregate.
Mar peaks. Sep 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) | 454 | 20.3% | |
| 2 | Building fires | 381 | 17.0% | |
| 3 | Arcing, shorted electrical equipment | 151 | 6.7% | |
| 4 | Power line down | 133 | 5.9% | |
| 5 | Electrical wiring/equipment problem, other | 109 | 4.9% |
15 cities sit in Harford County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Bel Air South | 57,109 | 0 | 0 | — |
| 2 | Bel Air North | 31,308 | 0 | 0 | — |
| 3 | Edgewood | 25,116 | 226 | 57 | B |
| 4 | Aberdeen | 16,422 | 274 | 51 | B- |
| 5 | Havre de Grace | 14,743 | 218 | 23 | B |
| 6 | Joppatowne | 13,391 | 0 | 0 | — |
| 7 | Bel Air | 10,630 | 523 | 88 | D |
| 8 | Fallston | 9,952 | 104 | 7 | B+ |
| 9 | Riverside | 5,924 | 0 | 0 | — |
| 10 | Abingdon | 5,111 | 192 | 39 | C |
| 11 | Pleasant Hills | 3,925 | 0 | 0 | — |
| 12 | Aberdeen Proving Ground | 2,703 | 0 | 0 | — |
| 13 | Jarrettsville | 2,677 | 65 | 7 | C+ |
| 14 | Perryman | 2,403 | 3 | 1 | A+ |
| 15 | Pylesville | 780 | 55 | 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 Harford 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.