ZIP 03303 recorded 163 fire and hazmat incidents in 2025, 574 across 2021–2025. Primary county: Merrimack County, NH.
574 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 110 | |
| 2022 | 85 | |
| 2023 | 88 | |
| 2024 | 128 | |
| 2025 | 163 |
Dec peaks. Oct dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 03303 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Building fires | 136 | 23.7% | |
| 2 | Power line down | 68 | 11.8% | |
| 3 | Unauthorized burning | 48 | 8.4% | |
| 4 | Carbon monoxide incident | 34 | 5.9% | |
| 5 | Gas leak (natural gas or LPG) | 33 | 5.7% |
For the 55 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 03303 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 15 | 15.3% | |
| 2 | Undetermined | 15 | 15.3% | |
| 3 | Engine area, running gear, wheel area | 12 | 12.2% | |
| 4 | Highway, parking lot, street: on or near | 9 | 9.2% | |
| 5 | Cooking area, kitchen | 5 | 5.1% | |
| 6 | Open area - outside; included are farmland, field | 5 | 5.1% | |
| 7 | Bedroom - < 5 persons; included are jail or prison | 4 | 4.1% | |
| 8 | Common room, den, family room, living room, lounge | 3 | 3.1% | |
| 9 | All other areas | 30 | 30.6% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 42 | 42.9% | |
| 2 | Hot ember or ash | 8 | 8.2% | |
| 3 | Arcing | 7 | 7.1% | |
| 4 | Hot or smoldering object, other | 7 | 7.1% | |
| 5 | Cigarette | 5 | 5.1% | |
| 6 | Heat spread from another fire, other | 5 | 5.1% | |
| 7 | Spark, ember or flame from operating equipment | 4 | 4.1% | |
| 8 | Radiated, conducted heat from operating equipment | 4 | 4.1% | |
| 9 | All other sources | 16 | 16.3% |
Largest single-incident losses in ZIP 03303 across 2021–2025. These 8 fires alone account for 385% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,508,133 | Building fires | 2021 | Major |
| 2 | $1,000,000 | Building fires | 2024 | Major |
| 3 | $800,000 | Building fires | 2024 | Major |
| 4 | $400,000 | Building fires | 2025 | Major |
| 5 | $300,000 | Building fires | 2025 | Major |
| 6 | $295,500 | Building fires | 2024 | Major |
| 7 | $250,000 | Building fires | 2021 | Major |
| 8 | $170,000 | Building fires | 2025 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 03303.
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 — 574 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.