New Haven County, Connecticut
80 ZIP codes · Avg score 51/100 · Grade D
ZipCheckup grade for New Haven County: D.
Federal records show several conditions worth reviewing.
Households in New Haven County can use the low grade as a prompt: check the water system serving your address, and consider testing your own tap if the records concern you. The county page lists 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
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
Modeled additional annual cost estimate per homeowner: $4,050, largest modeled factor: Sea Level
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: $4,050
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
Modeled remediation costs in New Haven 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.
Water systems mapped to New Haven County ZIP codes
8 community water systems mapped to New Haven County ZIP codes; EPA may list more systems serving the county.
- D
- C
- D
- D
- F
- D
Show all 8 water systems
- D
- C
20 water systems mapped to New Haven County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in New Haven County
5 water systems with violations in EPA records.
- F
- D
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- 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
When no specific signal shows up in the records, the list falls back to general water testing and filtration guides rather than staying empty.
- Water Filters Certified for PFAS Reduction — 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 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.