COUNTY REPORT NJ

Middlesex County, New Jersey

48 ZIP codes · Avg score 65/100 · Grade C

ZipCheckup grade for Middlesex County: C.

A mixed picture - some signals here are worth your attention.

Somewhere in the middle: that is where the composite score for Middlesex County lands, across 48 tracked ZIP codes.

How Middlesex County Compares

Middlesex County65/100
New Jersey avg61/100
National avg73/100

How Middlesex County Compares

C
County Grade
65/100
Avg Safety Score
48
ZIP Codes
17
Water Systems

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

C
County Grade
65
Avg Safety Score
48
ZIP Codes
North Brunswick
Best ZIP: 08902 (79/100)
Monroe Township
Lowest ZIP: 08831 (55/100)
$416K
Median Home Value
$645
Avg Remediation (0.16% of home value)

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.

A B C D F

Key Risk Factors

Health risk index: 10.8 (asthma 8.4%, diabetes 11.6%)

Modeled additional annual cost estimate per homeowner: $4,419, largest modeled factor: Sea Level

59% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 8.4% (national: 8.9%)
Diabetes 11.6% (national: 10.5%)
Obesity 29.9% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1968
Median Build Year
59%
Pre-1980 Housing
50/100
Infrastructure Stress Indicator
93%
ZIPs with High Infrastructure Stress
High
Lead Pipe Risk

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: $4,419

Sea Level Rise $2,510/yr
Flood $1,773/yr
Energy Code Gap $486/yr

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

Pre-1940 11%
1940–1959 21%
1960–1979 27%
1980–1999 26%
2000+ 15%

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

$416K
Median Home Value
$645
Est. Remediation Cost
0.2%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in Middlesex 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 Middlesex County residents

Asthma 8.4% (US avg: 8.9%)
Diabetes 11.6% (US avg: 11%)
Obesity 29.9% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems mapped to Middlesex County ZIP codes

8 community water systems mapped to Middlesex County ZIP codes; EPA may list more systems serving the county.

Show all 8 water systems

17 water systems mapped to Middlesex County ZIP codes in our data; EPA may list more systems serving the county.

Systems with the most violations in Middlesex County

5 water systems with violations in EPA records.

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

The mix of guides changes from county to county.

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

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Frequently Asked Questions

Is water safe in Middlesex County?
Middlesex County receives a grade of C. Some ZIP codes have recorded violations and residents in affected areas may want to test their water.
How many water systems serve Middlesex County?
We map 17 public water systems to 48 ZIP codes in our data for Middlesex County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Middlesex County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Middlesex County is sea level. Across all modeled risk factors, the estimated average additional annual cost is $4,419 per homeowner; actual costs vary by home.
How old are homes in Middlesex County?
The median home build year in Middlesex County is 1968. 59% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.
How does Middlesex County compare to New Jersey?
Middlesex County has an average Home Safety Score of 65/100 under model 4.0.0, which is at or above the New Jersey state average of 61/100.

How to cite this page

APA ZipCheckup. (2026). Middlesex County, NJ: HSS 65/100; 23 Health Violations. https://zipcheckup.com/county/new-jersey/middlesex/
BibTeX 
@misc{zipcheckup-county-new-jersey-middlesex,
  author = {{ZipCheckup}},
  title  = {{Middlesex County, NJ: HSS 65/100; 23 Health Violations}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/new-jersey/middlesex/}
}

Page version: October 2026.

Get safety alerts for Middlesex, New Jersey

Free updates when EPA data changes for this area. No spam.

Unsubscribe anytime. Privacy Policy.

Share This Page

X Facebook
Check your water filter options Free tool - no phone call required.