ZIP 01731 recorded 0 fire and hazmat incidents in 2025, 49 across 2021–2025. Primary county: Middlesex County, MA. FEMA NRI rates wildfire risk here as High.
49 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 29 | |
| 2022 | 4 | |
| 2023 | 9 | |
| 2024 | 7 | |
| 2025 | 0 |
Jun peaks. Jul dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 01731 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Aircraft standby | 16 | 32.7% | |
| 2 | Gasoline or other flammable liquid spill | 12 | 24.5% | |
| 3 | Building fires | 6 | 12.2% | |
| 4 | Flammable gas or liquid condition, other | 3 | 6.1% | |
| 5 | Oil or other combustible liquid spill | 3 | 6.1% |
For the 0 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 01731 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 1 | 100.0% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Explosive, fireworks, other | 1 | 100.0% |
Largest single-incident losses in ZIP 01731 across 2021–2025. These 1 fires alone account for 0% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1 | Building fires | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 01731.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Bedford | 31 | |
| 2 | Lincoln | 6 | |
| 3 | Lexington | 5 | |
| 4 | Hanscom AFB | 3 | |
| 5 | Concord | 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 — 49 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.