ZIP 21001 recorded 284 fire and hazmat incidents in 2025, 1,423 across 2021–2025. Primary county: Harford County, MD.
1,423 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 260 | |
| 2022 | 260 | |
| 2023 | 328 | |
| 2024 | 291 | |
| 2025 | 284 |
Apr peaks. Jan dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 21001 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Building fires | 263 | 18.5% | |
| 2 | Gas leak (natural gas or LPG) | 243 | 17.1% | |
| 3 | Electrical wiring/equipment problem, other | 71 | 5.0% | |
| 4 | Passenger vehicle fire | 70 | 4.9% | |
| 5 | Carbon monoxide incident | 60 | 4.2% |
For the 54 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 21001 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 43 | 17.3% | |
| 2 | Undetermined | 41 | 16.5% | |
| 3 | Outside area, other | 23 | 9.3% | |
| 4 | Wildland, woods | 16 | 6.5% | |
| 5 | Open area - outside; included are farmland, field | 14 | 5.6% | |
| 6 | Bedroom - < 5 persons; included are jail or prison | 10 | 4.0% | |
| 7 | Vehicle area, other | 9 | 3.6% | |
| 8 | Operator/passenger area of transportation equip. | 8 | 3.2% | |
| 9 | All other areas | 84 | 33.9% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 143 | 57.7% | |
| 2 | Heat from powered equipment, other | 18 | 7.3% | |
| 3 | Hot or smoldering object, other | 16 | 6.5% | |
| 4 | Hot ember or ash | 13 | 5.2% | |
| 5 | Arcing | 10 | 4.0% | |
| 6 | Cigarette | 8 | 3.2% | |
| 7 | Heat source: other | 7 | 2.8% | |
| 8 | Radiated, conducted heat from operating equipment | 7 | 2.8% | |
| 9 | All other sources | 26 | 10.5% |
Largest single-incident losses in ZIP 21001 across 2021–2025. These 8 fires alone account for 0% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $620,000 | Building fires | 2023 | Major |
| 2 | $175,000 | Building fires | 2023 | Significant |
| 3 | $150,000 | Building fires | 2021 | Significant |
| 4 | $100,000 | Building fires | 2021 | Significant |
| 5 | $100,000 | Building fires | 2022 | Significant |
| 6 | $70,000 | Building fires | 2022 | Significant |
| 7 | $50,000 | Building fires | 2024 | Significant |
| 8 | $40,000 | Building fires | 2021 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 21001.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Aberdeen | 1,408 | |
| 2 | Rising Sun | 13 | |
| 3 | Natick | 1 |
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
NFIRS reports each fire incident with a 5-digit address ZIP. We aggregate those rows directly to produce ZIP-level totals — 1,423 incidents in this ZIP across 2021–2025. Building-fire breakdowns (Area of Origin, Heat Source, ignition cause) only count fires investigators classified beyond the basic incident report. Because NFIRS reporting is voluntary, totals are a strong indicator rather than a complete census.