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ZIP-level NFIRS data

Fires in ZIP 08691

ZIP 08691 recorded 175 fire and hazmat incidents in 2025, 720 across 2021–2025. Primary county: Mercer County, NJ. FEMA NRI rates wildfire risk here as High.

ZIP 08691 FIPS 34021 ZIP-level 2 counties
Total incidents (2025)
175
720 across 5 years
Building fires
7
29 wildland
Wildfire risk
73
FEMA NRI · High
Active fires
0
in Mercer County
01 Five-year trend

Year over year in ZIP 08691

720 incidents from 2021 through 2025 inside this ZIP.

YearIncidents 
2021 63
2022 126
2023 153
2024 203
2025 175
02 Seasonality

When do fires happen in ZIP 08691?

Jul peaks. Oct dips. Aggregated across all 5 years inside this ZIP.

Jan 66
Feb 58
Mar 63
Apr 51
May 61
Jun 70
Jul 87
Aug 62
Sep 45
Oct 40
Nov 49
Dec 68
03 Top incident types

What kinds of calls lead in ZIP 08691?

Top 5 NFIRS incident types for ZIP 08691 across 2021–2025.

#Incident typeCountShare 
1 Gas leak (natural gas or LPG) 144 20.0%
2 Brush, or brush and grass mixture fire 82 11.4%
3 Passenger vehicle fire 78 10.8%
4 Building fires 62 8.6%
5 Power line down 49 6.8%
04 Cause of ignition

What sparks fires in ZIP 08691?

For the 7 building fires reported here in 2025, here's how investigators classified ignition cause.

Unintentional
29%
58
Cause undetermined
41%
83
Intentional / arson
3%
6
Equipment / heat source failure
7%
14
Under investigation
16%
32
Act of nature (lightning)
4%
7
05 Where fires start

Where in the building fires start

NFIRS Area of Origin for ZIP 08691 fires across 2021–2025.

#Area of originCountShare 
1 Undetermined 55 27.4%
2 Engine area, running gear, wheel area 43 21.4%
3 Highway, parking lot, street: on or near 31 15.4%
4 Open area - outside; included are farmland, field 10 5.0%
5 Outside area, other 9 4.5%
6 Cooking area, kitchen 7 3.5%
7 Courtyard, patio, porch, terrace 6 3.0%
8 Other 5 2.5%
9 All other areas 35 17.4%
06 What ignited it

The leading heat sources here

NFIRS HEAT_SOURC code — the physical thing that started the fire.

#Heat sourceCountShare 
1 Undetermined 141 70.1%
2 Heat from powered equipment, other 9 4.5%
3 Radiated, conducted heat from operating equipment 8 4.0%
4 Arcing 8 4.0%
5 Hot ember or ash 6 3.0%
6 Hot or smoldering object, other 5 2.5%
7 Heat, spark from friction 4 2.0%
8 Heat from other open flame or smoking materials 4 2.0%
9 All other sources 16 8.0%
07 The biggest fires

8 fires · $1.8M in losses

Largest single-incident losses in ZIP 08691 across 2021–2025. These 8 fires alone account for 512% of the ZIP's 2025 reported total.

#Property lossTypeYearSeverity
1 $500,000 Building fires 2023 Major
2 $400,000 Mobile property (vehicle) fire, other 2023 Major
3 $250,000 Building fires 2023 Major
4 $250,000 Building fires 2024 Major
5 $200,000 Building fires 2024 Significant
6 $100,000 Passenger vehicle fire 2025 Significant
7 $50,000 Road freight or transport vehicle fire 2024 Significant
8 $50,000 Passenger vehicle fire 2025 Significant
08 Cities in this ZIP

Most active cities in ZIP 08691

Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 08691.

#City5-yr incidents 
1 Robbinsville 494
2 Hamilton 209
3 Trenton 2
4 Upper Freehold 2
10 Also served by

ZIP 08691 crosses 2 counties

Some ZIPs span multiple counties. The primary above is the largest by population weight; secondary counties are below.

CountyStateWeight 
Monmouth County NJ 1.00 FIPS 34025
11 Current conditions

Right now in 08691

The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.

About ZIP-level data

NFIRS reports each fire incident with a 5-digit address ZIP. We aggregate those rows directly to produce ZIP-level totals — 720 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.