Mercer County, New Jersey
39 ZIP codes · Avg score 45/100 · Grade D
ZipCheckup grade for Mercer County: D.
Federal records show several conditions worth reviewing.
Your top priority: see the breakdown below and consider a certified water filter. NSF certified filters →
A low composite grade for Mercer County is a reason to look closely at your own ZIP report, one of 39 listed, rather than proof of a problem at your tap.
How Mercer County Compares
How Mercer County Compares
Mercer County scores 16 points below the New Jersey state average (61/100) and 28 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: Mercer County, New Jersey
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.6 (asthma 9%, diabetes 11.1%)
Modeled additional annual cost estimate per homeowner: $2,787, largest modeled factor: Sea Level
64% of homes built before 1980 (lead paint was banned for residential use in 1978)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,787
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
156,478 housing units in Mercer County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Mercer County
Modeled remediation costs in Mercer County can be compared with the median property value; actual costs vary by property.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Mercer County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to Mercer County ZIP codes
8 community water systems mapped to Mercer County ZIP codes; EPA may list more systems serving the county.
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- D
Show all 8 water systems
- D
- C
14 water systems mapped to Mercer County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in Mercer County
5 water systems with violations in EPA records.
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- C
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All ZIP Codes in Mercer County
39 ZIP codes tracked in Mercer County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 08640 | Fort Dix | 63 | C | 10 | — |
| 2 | 08641 | Trenton | 63 | C | 24 | — |
| 3 | 08534 | Pennington | 50 | D | 95 (4 health) | $573K |
| 4 | 08542 | Princeton | 50 | D | 0 | $755K |
| 5 | 08544 | Princeton | 50 | D | 0 | — |
| 6 | 08550 | Princeton Junction | 50 | D | 0 | $759K |
| 7 | 08608 | Trenton | 50 | D | 91 (4 health) | — |
| 8 | 08609 | Trenton | 50 | D | 91 (4 health) | $97K |
| 9 | 08610 | Trenton | 50 | D | 98 (5 health) | $249K |
| 10 | 08611 | Trenton | 50 | D | 91 (4 health) | $142K |
| 11 | 08620 | Trenton | 50 | D | 114 (5 health) | $341K |
| 12 | 08629 | Trenton | 50 | D | 91 (4 health) | $149K |
| 13 | 08638 | Trenton | 50 | D | 91 (4 health) | $227K |
| 14 | 08520 | Hightstown | 44 | D | 19 (1 health) | $362K |
| 15 | 08540 | Princeton | 33 | F | 131 (7 health) | $723K |
| 16 | 08560 | Titusville | 33 | F | 91 (4 health) | $400K |
| 17 | 08618 | Trenton | 33 | F | 91 (4 health) | $212K |
| 18 | 08619 | Trenton | 33 | F | 107 (4 health) | $321K |
| 19 | 08628 | Trenton | 33 | F | 91 (4 health) | $358K |
| 20 | 08648 | Lawrence Township | 33 | F | 111 (4 health) | $395K |
| 21 | 08690 | Trenton | 33 | F | 107 (4 health) | $363K |
| 22 | 08691 | Trenton | 33 | F | 107 (4 health) | $524K |
| 23 | 08525 | Hopewell | — | — | 14 (2 health) | $551K |
| 24 | 08541 | Princeton | — | — | — | |
| 25 | 08561 | Windsor | — | — | 16 | $480K |
| 26 | 08602 | Trenton | — | — | — | |
| 27 | 08603 | Trenton | — | — | — | |
| 28 | 08604 | Trenton | — | — | — | |
| 29 | 08605 | Trenton | — | — | — | |
| 30 | 08606 | Trenton | — | — | — | |
| 31 | 08607 | Trenton | — | — | — | |
| 32 | 08625 | Trenton | — | — | — | |
| 33 | 08644 | Trenton | — | — | — | |
| 34 | 08645 | Trenton | — | — | — | |
| 35 | 08646 | Trenton | — | — | — | |
| 36 | 08647 | Trenton | — | — | — | |
| 37 | 08650 | Trenton | — | — | — | |
| 38 | 08666 | Trenton | — | — | — | |
| 39 | 08695 | Trenton | — | — | — |
Recommended Buyer Guides for Mercer County
Up to five guides, picked by rule.
- Water Filters Certified for PFAS Reduction — PFAS detected in 16 ZIP codes
- Best Lead Paint Test Kits — 64% of homes built before 1980
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Mercer County, New Jersey
Overview
Mercer County in New Jersey covers 39 tracked ZIP records with an average Home Safety Score of D (45/100) across 22 scored records.
21 of 24 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 11 health-based violations appear in the available health breakdown.
← Back to New Jersey Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
What You Can Do
Mercer County has an average Home Safety grade of D across its scored ZIP records. Here are steps to protect your household.
Test your tap water
Ask a certified laboratory which tests it offers for lead, bacteria, and other contaminants relevant to your home; a $20-$50 kit may cover only certain contaminants.
Consider a certified water filter
NSF/ANSI-certified filters reduce the specific contaminants listed on their certification. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It reports monitored contaminants detected in the utility's water and related compliance information.
Check for lead in your home
64% of homes in this county were built before 1980. Older plumbing and solder can leach lead into drinking water, especially after water sits in the pipes.