New Haven County, Connecticut
80 ZIP codes · Avg score 51/100 · Grade D · Updated
ZipCheckup grade for New Haven County: D.
Several federal signals point to home-safety risks in this ZIP.
Compared to state averages, New Haven County scores below the baseline - health violations appear more frequently than the norm across its 80 ZIP codes.
How New Haven County Compares
How New Haven County Compares
New Haven County scores 12 points below the Connecticut state average (63/100) and 22 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: New Haven County, Connecticut
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Estimated additional annual cost per homeowner: $4,313, driven primarily by sea_level
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across New Haven County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 22 violations. Past 5 years: 26 total (26 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $4,313
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in New Haven County
Remediation costs are relatively manageable for most homeowners in New Haven 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.
Water systems serving New Haven County
8 community water systems serving New Haven County.
- D
- C
- D
- D
- F
- D
Show all 8 water systems
- D
- C
20 total water systems serve New Haven County.
Systems with the most violations in New Haven County
5 water systems with recorded EPA violations.
- F
- D
- F
- C
- C
All ZIP Codes in New Haven County
80 ZIP codes tracked in New Haven County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 06702 | Waterbury | 65 | C | 6 | — |
| 2 | 06705 | Waterbury | 65 | C | 6 | $178K |
| 3 | 06706 | Waterbury | 65 | C | 6 | $171K |
| 4 | 06770 | Naugatuck | 65 | C | 6 | $242K |
| 5 | 06712 | Prospect | 64 | C | 4 | $351K |
| 6 | 06704 | Waterbury | 63 | C | 11 | $179K |
| 7 | 06708 | Waterbury | 63 | C | 11 | $197K |
| 8 | 06401 | Ansonia | 50 | D | 0 | $268K |
| 9 | 06403 | Beacon Falls | 50 | D | 0 | $324K |
| 10 | 06405 | Branford | 50 | D | 0 | $388K |
| 11 | 06418 | Derby | 50 | D | 0 | $244K |
| 12 | 06437 | Guilford | 50 | D | 0 | $491K |
| 13 | 06443 | Madison | 50 | D | 0 | $535K |
| 14 | 06460 | Milford | 50 | D | 0 | $373K |
| 15 | 06461 | Milford | 50 | D | 0 | $396K |
| 16 | 06471 | North Branford | 50 | D | 0 | $365K |
| 17 | 06472 | Northford | 50 | D | 0 | $372K |
| 18 | 06477 | Orange | 50 | D | 0 | $467K |
| 19 | 06478 | Oxford | 50 | D | 1 | $455K |
| 20 | 06483 | Seymour | 50 | D | 1 | $345K |
| 21 | 06510 | New Haven | 50 | D | 0 | $496K |
| 22 | 06511 | New Haven | 50 | D | 0 | $313K |
| 23 | 06512 | East Haven | 50 | D | 0 | $265K |
| 24 | 06513 | New Haven | 50 | D | 0 | $227K |
| 25 | 06514 | Hamden | 50 | D | 0 | $250K |
| 26 | 06515 | New Haven | 50 | D | 0 | $284K |
| 27 | 06516 | West Haven | 50 | D | 0 | $265K |
| 28 | 06517 | Hamden | 50 | D | 0 | $313K |
| 29 | 06518 | Hamden | 50 | D | 0 | $308K |
| 30 | 06519 | New Haven | 50 | D | 0 | $248K |
| 31 | 06525 | Woodbridge | 50 | D | 0 | $546K |
| 32 | 06451 | Meriden | 49 | D | 4 | $223K |
| 33 | 06762 | Middlebury | 48 | D | 6 | $452K |
| 34 | 06716 | Wolcott | 46 | D | 12 (1 health) | $299K |
| 35 | 06473 | North Haven | 43 | D | 22 | $360K |
| 36 | 06450 | Meriden | 41 | D | 26 | $220K |
| 37 | 06492 | Wallingford | 41 | D | 26 | $328K |
| 38 | 06410 | Cheshire | 37 | F | 38 | $419K |
| 39 | 06488 | Southbury | 33 | F | 52 | $382K |
| 40 | 06075 | Stafford | — | — | — | |
| 41 | 06408 | Cheshire | — | — | — | |
| 42 | 06411 | Cheshire | — | — | — | |
| 43 | 06454 | Meriden | — | — | — | |
| 44 | 06487 | South Britain | — | — | — | |
| 45 | 06493 | Wallingford | — | — | — | |
| 46 | 06494 | Wallingford | — | — | — | |
| 47 | 06495 | Wallingford | — | — | — | |
| 48 | 06501 | New Haven | — | — | — | |
| 49 | 06502 | New Haven | — | — | — | |
| 50 | 06503 | New Haven | — | — | — | |
| 51 | 06504 | New Haven | — | — | — | |
| 52 | 06505 | New Haven | — | — | — | |
| 53 | 06506 | New Haven | — | — | — | |
| 54 | 06507 | New Haven | — | — | — | |
| 55 | 06508 | New Haven | — | — | — | |
| 56 | 06509 | New Haven | — | — | — | |
| 57 | 06520 | New Haven | — | — | — | |
| 58 | 06521 | New Haven | — | — | — | |
| 59 | 06524 | Bethany | — | — | $419K | |
| 60 | 06530 | New Haven | — | — | — | |
| 61 | 06531 | New Haven | — | — | — | |
| 62 | 06532 | New Haven | — | — | — | |
| 63 | 06533 | New Haven | — | — | — | |
| 64 | 06534 | New Haven | — | — | — | |
| 65 | 06535 | New Haven | — | — | — | |
| 66 | 06536 | New Haven | — | — | — | |
| 67 | 06537 | New Haven | — | — | — | |
| 68 | 06538 | New Haven | — | — | — | |
| 69 | 06540 | New Haven | — | — | — | |
| 70 | 06701 | Waterbury | — | — | — | |
| 71 | 06703 | Waterbury | — | — | — | |
| 72 | 06710 | Waterbury | — | — | 6 | $220K |
| 73 | 06720 | Waterbury | — | — | — | |
| 74 | 06721 | Waterbury | — | — | — | |
| 75 | 06722 | Waterbury | — | — | — | |
| 76 | 06723 | Waterbury | — | — | — | |
| 77 | 06724 | Waterbury | — | — | — | |
| 78 | 06725 | Waterbury | — | — | — | |
| 79 | 06726 | Waterbury | — | — | — | |
| 80 | 06749 | Waterbury | — | — | — |
Recommended Buyer Guides for New Haven County
Editorial-only picks, screened against the EPA detections on file.
- Best Water Filters for PFAS — PFAS detected in 5 ZIP codes
- 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 New Haven County, Connecticut
Overview
New Haven County in Connecticut covers 80 tracked ZIP records with an average Home Safety Score of D (51/100) across 39 scored records.
18 of 40 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 1 health-based violation appear in the available health breakdown.
← Back to Connecticut 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
New Haven 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.