Middlesex County, New Jersey
48 ZIP codes · Avg score 65/100 · Grade C · Updated
ZipCheckup grade for Middlesex County: C.
A mixed picture - some signals here are worth your attention.
Across Middlesex County's 48 ZIP codes, water safety results are uneven - a portion of systems carry active or recent violations, while others meet standards without issues.
How Middlesex County Compares
How Middlesex County Compares
Middlesex County scores 4 points above the New Jersey state average (61/100) and 8 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 Last verified:
ZIP Code Risk Map
Water Quality Map: Middlesex 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: 10.8 (asthma 8.4%, diabetes 11.6%)
Estimated additional annual cost per homeowner: $5,111, driven primarily by sea_level
71% of homes built before 1978 (lead paint era)
Violation History (2021–2026)
↑ Worsening trendEPA violation counts by year across Middlesex County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 16 violations. Past 5 years: 34 total (34 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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 DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $5,111
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
302,324 housing units in Middlesex 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 Middlesex County
Remediation costs are relatively manageable for most homeowners in Middlesex County, representing a small fraction of property value.
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 Middlesex County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Middlesex County
8 community water systems serving Middlesex County.
- C
- C
- C
- C
- C
- B
Show all 8 water systems
- B
- C
17 total water systems serve Middlesex County.
Systems with the most violations in Middlesex County
5 water systems with recorded EPA violations.
- C
- C
- C
- C
- B
All ZIP Codes in Middlesex County
48 ZIP codes tracked in Middlesex County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 08902 | North Brunswick | 79 | B | 19 (2 health) | $402K |
| 2 | 08536 | Plainsboro | 67 | C | 0 | $655K |
| 3 | 08812 | Dunellen | 67 | C | 0 | $435K |
| 4 | 08846 | Middlesex | 67 | C | 0 | $415K |
| 5 | 07008 | Carteret | 66 | C | 3 | $370K |
| 6 | 07067 | Colonia | 66 | C | 3 | $473K |
| 7 | 07077 | Sewaren | 66 | C | 3 | $415K |
| 8 | 07080 | South Plainfield | 66 | C | 3 | $444K |
| 9 | 07095 | Woodbridge | 66 | C | 3 | $361K |
| 10 | 08810 | Dayton | 66 | C | 6 (1 health) | $472K |
| 11 | 08824 | Kendall Park | 66 | C | 6 (1 health) | $603K |
| 12 | 08840 | Metuchen | 66 | C | 3 | $518K |
| 13 | 08852 | Monmouth Junction | 66 | C | 6 (1 health) | $489K |
| 14 | 08854 | Piscataway | 66 | C | 9 (1 health) | $424K |
| 15 | 08872 | Sayreville | 66 | C | 6 | $404K |
| 16 | 08904 | Highland Park | 66 | C | 1 | $464K |
| 17 | 08512 | Cranbury | 65 | C | 8 (2 health) | $618K |
| 18 | 08817 | Edison | 65 | C | 12 (1 health) | $411K |
| 19 | 08816 | East Brunswick | 64 | C | 9 (1 health) | $503K |
| 20 | 08861 | Perth Amboy | 64 | C | 10 (3 health) | $341K |
| 21 | 08884 | Spotswood | 63 | C | 6 | $358K |
| 22 | 08879 | South Amboy | 62 | C | 15 | $378K |
| 23 | 08857 | Old Bridge | 61 | C | 21 (1 health) | $459K |
| 24 | 08901 | New Brunswick | 61 | C | 26 | $317K |
| 25 | 08882 | South River | 58 | C | 22 (4 health) | $383K |
| 26 | 08850 | Milltown | 57 | C | 41 (13 health) | $437K |
| 27 | 08831 | Monroe Township | 55 | C | 40 (2 health) | $490K |
| 28 | 07001 | Avenel | — | — | 3 | $351K |
| 29 | 07064 | Port Reading | — | — | 3 | $416K |
| 30 | 08543 | Princeton | — | — | — | |
| 31 | 08818 | Edison | — | — | — | |
| 32 | 08820 | Edison | — | — | 12 (1 health) | $598K |
| 33 | 08828 | Helmetta | — | — | 4 | $321K |
| 34 | 08830 | Iselin | — | — | 3 | $394K |
| 35 | 08832 | Keasbey | — | — | 3 | $328K |
| 36 | 08837 | Edison | — | — | 12 (1 health) | $433K |
| 37 | 08855 | Piscataway | — | — | — | |
| 38 | 08862 | Perth Amboy | — | — | — | |
| 39 | 08863 | Fords | — | — | 3 | $414K |
| 40 | 08871 | Sayreville | — | — | — | |
| 41 | 08899 | Edison | — | — | — | |
| 42 | 08903 | New Brunswick | — | — | — | |
| 43 | 08905 | New Brunswick | — | — | — | |
| 44 | 08906 | New Brunswick | — | — | — | |
| 45 | 08922 | New Brunswick | — | — | — | |
| 46 | 08933 | New Brunswick | — | — | — | |
| 47 | 08988 | New Brunswick | — | — | — | |
| 48 | 08989 | New Brunswick | — | — | — |
Recommended Buyer Guides for Middlesex County
Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.
- Best Lead Paint Test Kits — 71% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Middlesex County, New Jersey
Overview
Middlesex County in New Jersey covers 48 tracked ZIP records with an average Home Safety Score of C (65/100) across 27 scored records.
32 of 35 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 23 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.