ZIP 01720 recorded 177 fire and hazmat incidents in 2025, 998 across 2021–2025. Primary county: Middlesex County, MA. FEMA NRI rates wildfire risk here as High.
998 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 262 | |
| 2022 | 187 | |
| 2023 | 165 | |
| 2024 | 207 | |
| 2025 | 177 |
Jan peaks. Aug dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 01720 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Gas leak (natural gas or LPG) | 239 | 23.9% | |
| 2 | Carbon monoxide incident | 129 | 12.9% | |
| 3 | Power line down | 68 | 6.8% | |
| 4 | Brush, or brush and grass mixture fire | 64 | 6.4% | |
| 5 | Arcing, shorted electrical equipment | 59 | 5.9% |
For the 6 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 01720 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 20 | 14.9% | |
| 2 | Undetermined | 15 | 11.2% | |
| 3 | Cooking area, kitchen | 14 | 10.4% | |
| 4 | Highway, parking lot, street: on or near | 10 | 7.5% | |
| 5 | Other | 9 | 6.7% | |
| 6 | Engine area, running gear, wheel area | 7 | 5.2% | |
| 7 | Wildland, woods | 7 | 5.2% | |
| 8 | Chute/container - trash, rubbish, waste | 4 | 3.0% | |
| 9 | All other areas | 48 | 35.8% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 56 | 41.8% | |
| 2 | Heat from powered equipment, other | 17 | 12.7% | |
| 3 | Arcing | 9 | 6.7% | |
| 4 | Hot or smoldering object, other | 9 | 6.7% | |
| 5 | Hot ember or ash | 8 | 6.0% | |
| 6 | Heat source: other | 5 | 3.7% | |
| 7 | Radiated, conducted heat from operating equipment | 5 | 3.7% | |
| 8 | Cigarette | 5 | 3.7% | |
| 9 | All other sources | 20 | 14.9% |
Largest single-incident losses in ZIP 01720 across 2021–2025. These 8 fires alone account for 1389% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $500,000 | Building fires | 2022 | Major |
| 2 | $400,000 | Building fires | 2021 | Major |
| 3 | $300,000 | Building fires | 2022 | Major |
| 4 | $175,000 | Building fires | 2023 | Significant |
| 5 | $125,000 | Building fires | 2024 | Significant |
| 6 | $100,000 | Building fires | 2023 | Significant |
| 7 | $50,000 | Fire, other | 2022 | Significant |
| 8 | $50,000 | Building fires | 2024 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 01720.
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 — 998 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.