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2026 Rankings

Mercer County, New Jersey Home Safety Rankings - 48 ZIPs

Explore rankings under Home Safety Score model 4.0.0. Only ZIPs with all four required inputs are ranked; missing evidence is not imputed or reweighted.

Mercer County, New Jersey (New Jersey) includes 48 tracked ZIP codes and 15 mapped community water systems; confirm service for a specific address. Below are the water quality rankings for metro ZIPs with all required inputs.

Average Home Safety Grade: D (45/100)

Grade	ZIP Codes	%
A	0	0%
B	0	0%
C	2	9%
D	12	55%
F	8	36%

Top 10 ZIP Codes by Home Safety Score

Rank	ZIP	City	Score	Grade
1	08640	Fort Dix	63	C
2	08641	Trenton	63	C
3	08534	Pennington	50	D
4	08542	Princeton	50	D
5	08544	Princeton	50	D
6	08550	Princeton Junction	50	D
7	08608	Trenton	50	D
8	08609	Trenton	50	D
9	08610	Trenton	50	D
10	08611	Trenton	50	D

10 Riskiest ZIP Codes

Rank	ZIP	City	Score	Grade	Risk Factor
1	08691	Trenton	33	F	107 violations
2	08690	Trenton	33	F	107 violations
3	08648	Lawrence Township	33	F	111 violations
4	08628	Trenton	33	F	91 violations
5	08619	Trenton	33	F	107 violations
6	08618	Trenton	33	F	91 violations
7	08560	Titusville	33	F	91 violations
8	08501	Allentown	33	F	108 violations
9	08520	Hightstown	44	D	19 violations
10	08638	Trenton	50	D	91 violations

Most Common Contaminant Violations

Contaminant	Violations	ZIPs Affected
Stage 1 DBP Rule	234	20
Consumer Confidence Report Rule	212	16
E. coli	212	18
Revised Total Coliform Rule	212	18
Haloacetic Acids (HAA5)	116	18
Total Trihalomethanes (TTHM)	99	17
Fecal Coliform	64	16
Surface Water Treatment Rule	37	24

Lead Risk

Average of reported 90th-percentile lead results: 0.0048 mg/L (below EPA action level)
0 of 30 ZIP codes with known status exceed EPA lead action level
26% of housing built before 1950
54% of housing built before 1970

Cities in This Metro

Trenton, NJ — 28 ZIP codes
Princeton, NJ — 4 ZIP codes
Millstone Township, NJ — 2 ZIP codes
Allentown, NJ — 1 ZIP code
Blawenburg, NJ — 1 ZIP code
Chesterfield, NJ — 1 ZIP code
Hightstown, NJ — 1 ZIP code
Hopewell, NJ — 1 ZIP code
Pennington, NJ — 1 ZIP code
Princeton Junction, NJ — 1 ZIP code
Ringoes, NJ — 1 ZIP code
Roosevelt, NJ — 1 ZIP code
Skillman, NJ — 1 ZIP code
Titusville, NJ — 1 ZIP code
Windsor, NJ — 1 ZIP code
Fort Dix, NJ — 1 ZIP code
Lawrence Township, NJ — 1 ZIP code

All 48 ZIP Codes Ranked

View complete ranking

Rank	ZIP	City	Score	Grade	Violations
1	08640	Fort Dix	63	C	10
2	08641	Trenton	63	C	24
3	08534	Pennington	50	D	95
4	08542	Princeton	50	D	0
5	08544	Princeton	50	D	0
6	08550	Princeton Junction	50	D	0
7	08608	Trenton	50	D	91
8	08609	Trenton	50	D	91
9	08610	Trenton	50	D	98
10	08611	Trenton	50	D	91
11	08620	Trenton	50	D	114
12	08629	Trenton	50	D	91
13	08638	Trenton	50	D	91
14	08520	Hightstown	44	D	19
15	08501	Allentown	33	F	108
16	08560	Titusville	33	F	91
17	08618	Trenton	33	F	91
18	08619	Trenton	33	F	107
19	08628	Trenton	33	F	91
20	08648	Lawrence Township	33	F	111
21	08690	Trenton	33	F	107
22	08691	Trenton	33	F	107
23	08510	Millstone Township	—	—	1
24	08515	Chesterfield	—	—	48
25	08525	Hopewell	—	—	14
26	08535	Millstone Township	—	—	1
27	08551	Ringoes	—	—	0
28	08555	Roosevelt	—	—	1
29	08558	Skillman	—	—	0
30	08561	Windsor	—	—	16

Data Sources

Water quality: EPA SDWIS
Housing: U.S. Census Bureau American Community Survey
Flood: FEMA NFIP
Flood scope: historical NFIP claim records and claim-rated-zone evidence; this is not current property-map coverage.

Reporting periods vary by source; the page metadata identifies this materialization.

Methodology
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →

Disclaimer: Scores are based on EPA SDWIS reported data and are not a guarantee of current water safety. Water quality can change. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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How to cite this page

APA

ZipCheckup. (2026). Mercer County, New Jersey Home Safety Rankings - 48 ZIPs. https://zipcheckup.com/rankings/metro/mercer-new-jersey/

BibTeX

@misc{zipcheckup-rankings-metro-mercer-new-jersey,
  author = {{ZipCheckup}},
  title  = {{Mercer County, New Jersey Home Safety Rankings - 48 ZIPs}},
  year   = {2026},
  url    = {https://zipcheckup.com/rankings/metro/mercer-new-jersey/}
}

Page version: October 2026.

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