ZIP 02420 recorded 19 fire and hazmat incidents in 2025, 138 across 2021–2025. Primary county: Middlesex County, MA. FEMA NRI rates wildfire risk here as High.
138 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 31 | |
| 2022 | 30 | |
| 2023 | 31 | |
| 2024 | 27 | |
| 2025 | 19 |
May peaks. Apr dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 02420 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Building fires | 37 | 26.8% | |
| 2 | Brush, or brush and grass mixture fire | 17 | 12.3% | |
| 3 | Carbon monoxide incident | 15 | 10.9% | |
| 4 | Cooking fire, confined to container | 10 | 7.2% | |
| 5 | Passenger vehicle fire | 9 | 6.5% |
For the 3 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 02420 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 24 | 34.8% | |
| 2 | Engine area, running gear, wheel area | 6 | 8.7% | |
| 3 | Open area - outside; included are farmland, field | 6 | 8.7% | |
| 4 | Wildland, woods | 4 | 5.8% | |
| 5 | Undetermined | 4 | 5.8% | |
| 6 | Bedroom - < 5 persons; included are jail or prison | 3 | 4.3% | |
| 7 | Chute/container - trash, rubbish, waste | 3 | 4.3% | |
| 8 | Laundry area, wash house (laundry) | 2 | 2.9% | |
| 9 | All other areas | 17 | 24.6% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 33 | 47.8% | |
| 2 | Arcing | 9 | 13.0% | |
| 3 | Hot ember or ash | 4 | 5.8% | |
| 4 | Heat from other open flame or smoking materials | 4 | 5.8% | |
| 5 | Heat from powered equipment, other | 3 | 4.3% | |
| 6 | Cigarette lighter | 3 | 4.3% | |
| 7 | Hot or smoldering object, other | 2 | 2.9% | |
| 8 | Cigarette | 2 | 2.9% | |
| 9 | All other sources | 9 | 13.0% |
Largest single-incident losses in ZIP 02420 across 2021–2025. These 8 fires alone account for 2050000% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $2,000,000 | Building fires | 2023 | Major |
| 2 | $500,000 | Building fires | 2021 | Major |
| 3 | $250,000 | Building fires | 2024 | Major |
| 4 | $100,000 | Building fires | 2021 | Significant |
| 5 | $100,000 | Building fires | 2023 | Significant |
| 6 | $75,000 | Building fires | 2023 | Significant |
| 7 | $30,000 | Building fires | 2023 | Significant |
| 8 | $20,000 | Building fires | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 02420.
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 — 138 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.