Hunterdon County, New Jersey
41 ZIP codes · Avg score 47/100 · Grade D · Updated 2026-07-19
ZipCheckup grade for Hunterdon: D.
Several federal signals point to home-safety risks in this ZIP.
Your top priority: see the breakdown below and consider a certified water filter. NSF certified filters →
Water monitoring data from Hunterdon County's 41 ZIP codes tells a below-average story - health violations are present and system-level detail is worth checking.
How Hunterdon County Compares
How Hunterdon County Compares
Hunterdon County scores 11 points below the New Jersey state average (58/100) and 21 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Hunterdon 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 8.6%, diabetes 9.6%)
Estimated additional annual cost per homeowner: $4,538, driven primarily by sea_level
Infrastructure: 0.488% avg pipe failure probability, 78% of ZIPs at high risk
67.9% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Hunterdon County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 7 violations. Past 5 years: 17 total (17 health-based). Health-based violations are declining versus the prior 2-year window.
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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $4,538
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
103,125 housing units in Hunterdon 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 Hunterdon County
Remediation costs are relatively manageable for most homeowners in Hunterdon 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 Hunterdon County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Hunterdon County
8 community water systems serving Hunterdon County.
- D
- D
- D
- D
- D
- D
Show all 8 water systems
- D
- F
24 total water systems serve Hunterdon County.
Systems with the most violations in Hunterdon County
5 water systems with recorded EPA violations.
- F
- D
- D
- D
- D
All ZIP Codes in Hunterdon County
41 ZIP codes tracked in Hunterdon County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 08556 | Rosemont | 70 | B | 1 | — |
| 2 | 08557 | Sergeantsville | 69 | C | 2 | — |
| 3 | 08826 | Glen Gardner | 58 | C | 20 (4 health) | $442K |
| 4 | 08822 | Flemington | 57 | C | 4 | $514K |
| 5 | 08829 | High Bridge | 57 | C | 7 | $299K |
| 6 | 08867 | Pittstown | 57 | C | 4 | $580K |
| 7 | 08804 | Bloomsbury | 56 | C | 6 | $439K |
| 8 | 08530 | Lambertville | 54 | D | 9 (1 health) | $554K |
| 9 | 07831 | Changewater | 53 | D | 0 | — |
| 10 | 07938 | Liberty Corner | 53 | D | 0 | — |
| 11 | 08834 | Little York | 53 | D | 0 | — |
| 12 | 08858 | Oldwick | 53 | D | 0 | — |
| 13 | 08870 | Readington | 53 | D | 0 | — |
| 14 | 08885 | Stanton | 53 | D | 0 | — |
| 15 | 08887 | Three Bridges | 53 | D | 0 | $268K |
| 16 | 08559 | Stockton | 51 | D | 18 (1 health) | $556K |
| 17 | 08833 | Lebanon | 51 | D | 11 | $575K |
| 18 | 08809 | Clinton | 46 | D | 13 | $413K |
| 19 | 07921 | Bedminster | 45 | D | 0 | $431K |
| 20 | 07979 | Pottersville | 45 | D | 0 | — |
| 21 | 08801 | Annandale | 45 | D | 0 | $501K |
| 22 | 08827 | Hampton | 45 | D | 0 | $429K |
| 23 | 08836 | Martinsville | 45 | D | 0 | $787K |
| 24 | 08853 | Neshanic Station | 45 | D | 0 | $639K |
| 25 | 08869 | Raritan | 45 | D | 0 | $449K |
| 26 | 08889 | Whitehouse Station | 45 | D | 0 | $523K |
| 27 | 08890 | Zarephath | 45 | D | 0 | — |
| 28 | 07059 | Warren | 40 | D | 0 | $899K |
| 29 | 07978 | Pluckemin | 40 | D | 0 | — |
| 30 | 08803 | Baptistown | 40 | D | 0 | — |
| 31 | 08821 | Flagtown | 40 | D | 0 | $447K |
| 32 | 08825 | Frenchtown | 40 | D | 0 | $472K |
| 33 | 08868 | Quakertown | 40 | D | 0 | — |
| 34 | 08880 | South Bound Brook | 40 | D | 0 | $345K |
| 35 | 08888 | Whitehouse | 40 | D | 0 | — |
| 36 | 07830 | Califon | 35 | F | 48 (8 health) | $622K |
| 37 | 08807 | Bridgewater | 35 | F | 0 | $562K |
| 38 | 08812 | Dunellen | 35 | F | 0 | $435K |
| 39 | 08876 | Somerville | 35 | F | 0 | $468K |
| 40 | 08835 | Manville | 30 | F | 0 | $321K |
| 41 | 08846 | Middlesex | 30 | F | 0 | $415K |
Recommended Buyer Guides for Hunterdon County
Designed to find the guide that fits the county, not the other way around - the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 67.9% of homes built before 1978
- 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 Hunterdon County, New Jersey
Overview
Hunterdon County in New Jersey covers 41 ZIP codes with an average Home Safety Score of D (47/100).
12 of 41 ZIP codes have recorded EPA violations. 14 health-based violations have been documented.
← Back to New Jersey water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.
What You Can Do
Hunterdon County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. 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 details exactly what was found in your water supply.
Check for lead in your home
67.9% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.