ZIP 48109 recorded 26 fire and hazmat incidents in 2025, 147 across 2021–2025. Primary county: Washtenaw County, MI. FEMA NRI rates wildfire risk here as Moderate.
147 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 36 | |
| 2022 | 29 | |
| 2023 | 22 | |
| 2024 | 34 | |
| 2025 | 26 |
Oct peaks. Jul dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 48109 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Fire, other | 19 | 12.9% | |
| 2 | Building fires | 19 | 12.9% | |
| 3 | Cooking fire, confined to container | 12 | 8.2% | |
| 4 | Electrical wiring/equipment problem, other | 12 | 8.2% | |
| 5 | Gas leak (natural gas or LPG) | 11 | 7.5% |
For the 6 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 48109 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Laboratory | 10 | 23.3% | |
| 2 | Office | 4 | 9.3% | |
| 3 | Undetermined | 4 | 9.3% | |
| 4 | Cooking area, kitchen | 3 | 7.0% | |
| 5 | Laundry area, wash house (laundry) | 3 | 7.0% | |
| 6 | Engine area, running gear, wheel area | 3 | 7.0% | |
| 7 | Processing/manufacturing area, workroom | 2 | 4.7% | |
| 8 | Machinery room or area; elevator machinery room | 2 | 4.7% | |
| 9 | All other areas | 12 | 27.9% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Heat from powered equipment, other | 9 | 20.9% | |
| 2 | Heat source: other | 7 | 16.3% | |
| 3 | Undetermined | 6 | 14.0% | |
| 4 | Chemical reaction | 5 | 11.6% | |
| 5 | Radiated, conducted heat from operating equipment | 4 | 9.3% | |
| 6 | Arcing | 3 | 7.0% | |
| 7 | Hot or smoldering object, other | 3 | 7.0% | |
| 8 | Spark, ember or flame from operating equipment | 2 | 4.7% | |
| 9 | All other sources | 4 | 9.3% |
Largest single-incident losses in ZIP 48109 across 2021–2025. These 8 fires alone account for 980% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $30,000 | Passenger vehicle fire | 2021 | Significant |
| 2 | $20,000 | Passenger vehicle fire | 2024 | Significant |
| 3 | $20,000 | Passenger vehicle fire | 2024 | Significant |
| 4 | $10,000 | Building fires | 2021 | Significant |
| 5 | $10,000 | Building fires | 2025 | Significant |
| 6 | $8,000 | Passenger vehicle fire | 2024 | Significant |
| 7 | $5,000 | Cooking fire, confined to container | 2021 | Significant |
| 8 | $5,000 | Building fires | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 48109.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Ann Arbor | 146 |
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 — 147 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.