ZIP 20866 recorded 43 fire and hazmat incidents in 2025, 204 across 2021–2025. Primary county: Montgomery County, MD.
204 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 24 | |
| 2022 | 42 | |
| 2023 | 43 | |
| 2024 | 52 | |
| 2025 | 43 |
Apr peaks. Jan dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 20866 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Gas leak (natural gas or LPG) | 37 | 18.1% | |
| 2 | Hazardous condition, other | 28 | 13.7% | |
| 3 | Building fires | 17 | 8.3% | |
| 4 | Passenger vehicle fire | 16 | 7.8% | |
| 5 | Carbon monoxide incident | 15 | 7.4% |
For the 4 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 20866 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 13 | 18.6% | |
| 2 | Cooking area, kitchen | 8 | 11.4% | |
| 3 | Other | 5 | 7.1% | |
| 4 | Outside area, other | 5 | 7.1% | |
| 5 | Courtyard, patio, porch, terrace | 4 | 5.7% | |
| 6 | Wildland, woods | 4 | 5.7% | |
| 7 | Function area, other | 3 | 4.3% | |
| 8 | Bedroom - < 5 persons; included are jail or prison | 3 | 4.3% | |
| 9 | All other areas | 25 | 35.7% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 26 | 37.1% | |
| 2 | Heat from powered equipment, other | 11 | 15.7% | |
| 3 | Arcing | 6 | 8.6% | |
| 4 | Heat source: other | 5 | 7.1% | |
| 5 | Radiated, conducted heat from operating equipment | 3 | 4.3% | |
| 6 | Hot or smoldering object, other | 3 | 4.3% | |
| 7 | Spark, ember or flame from operating equipment | 2 | 2.9% | |
| 8 | Heat from other open flame or smoking materials | 2 | 2.9% | |
| 9 | All other sources | 12 | 17.1% |
Largest single-incident losses in ZIP 20866 across 2021–2025. These 8 fires alone account for 361% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $500,000 | Building fires | 2024 | Major |
| 2 | $200,000 | Building fires | 2025 | Significant |
| 3 | $100,000 | Building fires | 2022 | Significant |
| 4 | $100,000 | Passenger vehicle fire | 2024 | Significant |
| 5 | $75,000 | Building fires | 2025 | Significant |
| 6 | $40,000 | Passenger vehicle fire | 2024 | Significant |
| 7 | $30,000 | Building fires | 2024 | Significant |
| 8 | $25,000 | Water vehicle fire | 2023 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 20866.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Burtonsville | 195 | |
| 2 | Silver Spring | 9 |
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 — 204 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.