ZIP 20166 recorded 133 fire and hazmat incidents in 2025, 954 across 2021–2025. Primary county: Loudoun County, VA.
954 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 223 | |
| 2022 | 269 | |
| 2023 | 166 | |
| 2024 | 163 | |
| 2025 | 133 |
Mar peaks. Oct dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 20166 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Gas leak (natural gas or LPG) | 183 | 19.2% | |
| 2 | Gasoline or other flammable liquid spill | 158 | 16.6% | |
| 3 | Aircraft standby | 102 | 10.7% | |
| 4 | Hazardous condition, other | 56 | 5.9% | |
| 5 | Building fires | 37 | 3.9% |
For the 5 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 20166 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 38 | 23.8% | |
| 2 | Outside area, other | 21 | 13.1% | |
| 3 | Engine area, running gear, wheel area | 20 | 12.5% | |
| 4 | Highway, parking lot, street: on or near | 14 | 8.8% | |
| 5 | Vehicle area, other | 8 | 5.0% | |
| 6 | Other | 7 | 4.4% | |
| 7 | Cooking area, kitchen | 6 | 3.8% | |
| 8 | Open area - outside; included are farmland, field | 6 | 3.8% | |
| 9 | All other areas | 40 | 25.0% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 86 | 53.8% | |
| 2 | Heat from powered equipment, other | 14 | 8.8% | |
| 3 | Hot or smoldering object, other | 14 | 8.8% | |
| 4 | Arcing | 6 | 3.8% | |
| 5 | Chemical reaction | 6 | 3.8% | |
| 6 | Heat source: other | 5 | 3.1% | |
| 7 | Radiated, conducted heat from operating equipment | 5 | 3.1% | |
| 8 | Hot ember or ash | 5 | 3.1% | |
| 9 | All other sources | 19 | 11.9% |
Largest single-incident losses in ZIP 20166 across 2021–2025. These 8 fires alone account for 702% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $195,030 | Building fires | 2021 | Significant |
| 2 | $190,000 | Building fires | 2021 | Significant |
| 3 | $100,000 | Mobile property (vehicle) fire, other | 2021 | Significant |
| 4 | $70,000 | Building fires | 2024 | Significant |
| 5 | $30,000 | Passenger vehicle fire | 2024 | Significant |
| 6 | $30,000 | Building fires | 2025 | Significant |
| 7 | $25,000 | Building fires | 2024 | Significant |
| 8 | $20,000 | Brush, or brush and grass mixture fire | 2024 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 20166.
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 — 954 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.