Fairfield County, Connecticut
65 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-07-19
ZipCheckup grade for Fairfield: C.
A mixed picture - some signals here are worth your attention.
The systems supplying Fairfield County's 65 ZIP codes vary in performance - most meet minimum standards, but violations in select areas are on record.
How Fairfield County Compares
How Fairfield County Compares
Fairfield County scores 7 points below the Connecticut state average (65/100) and 10 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Fairfield 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: $2,362, driven primarily by flood
Infrastructure: 0.439% avg pipe failure probability, 72% of ZIPs at high risk
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Fairfield County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 46 violations. Past 5 years: 101 total (101 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.
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: $2,362
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 Fairfield County
Remediation costs are relatively manageable for most homeowners in Fairfield 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 Fairfield County
8 community water systems serving Fairfield County.
- D
- C
- C
- D
- C
- C
Show all 8 water systems
- C
- C
48 total water systems serve Fairfield County.
Systems with the most violations in Fairfield County
5 water systems with recorded EPA violations.
- D
- C
- C
- C
- D
All ZIP Codes in Fairfield County
65 ZIP codes tracked in Fairfield County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 06813 | Danbury | 69 | C | 9 (1 health) | — |
| 2 | 06852 | Norwalk | 69 | C | 2 (1 health) | — |
| 3 | 06901 | Stamford | 69 | C | 40 (1 health) | $446K |
| 4 | 06904 | Stamford | 69 | C | 40 (1 health) | — |
| 5 | 06836 | Greenwich | 66 | C | 0 | — |
| 6 | 06468 | Monroe | 65 | C | 0 | $477K |
| 7 | 06814 | Danbury | 65 | C | 9 (1 health) | — |
| 8 | 06816 | Danbury | 65 | C | 9 (1 health) | — |
| 9 | 06817 | Danbury | 65 | C | 9 (1 health) | — |
| 10 | 06857 | Norwalk | 65 | C | 2 (1 health) | — |
| 11 | 06858 | Norwalk | 65 | C | 2 (1 health) | — |
| 12 | 06859 | Norwalk | 65 | C | 2 (1 health) | — |
| 13 | 06860 | Norwalk | 65 | C | 2 (1 health) | — |
| 14 | 06910 | Stamford | 65 | C | 40 (1 health) | — |
| 15 | 06911 | Stamford | 65 | C | 40 (1 health) | — |
| 16 | 06912 | Stamford | 65 | C | 40 (1 health) | — |
| 17 | 06913 | Stamford | 65 | C | 40 (1 health) | — |
| 18 | 06914 | Stamford | 65 | C | 40 (1 health) | — |
| 19 | 06920 | Stamford | 65 | C | 40 (1 health) | — |
| 20 | 06921 | Stamford | 65 | C | 40 (1 health) | — |
| 21 | 06922 | Stamford | 65 | C | 40 (1 health) | — |
| 22 | 06925 | Stamford | 65 | C | 40 (1 health) | — |
| 23 | 06926 | Stamford | 65 | C | 40 (1 health) | — |
| 24 | 06927 | Stamford | 65 | C | 40 (1 health) | — |
| 25 | 06928 | Stamford | 65 | C | 40 (1 health) | — |
| 26 | 06811 | Danbury | 64 | C | 9 (1 health) | $406K |
| 27 | 06856 | Norwalk | 64 | C | 2 (1 health) | — |
| 28 | 06879 | Ridgefield | 64 | C | 4 | — |
| 29 | 06906 | Stamford | 64 | C | 40 (1 health) | $576K |
| 30 | 06907 | Stamford | 64 | C | 40 (1 health) | $556K |
| 31 | 06812 | New Fairfield | 63 | C | 4 | $456K |
| 32 | 06804 | Brookfield | 62 | C | 7 | $452K |
| 33 | 06828 | Fairfield | 61 | C | 8 (1 health) | — |
| 34 | 06883 | Weston | 60 | C | 1 | $968K |
| 35 | 06801 | Bethel | 59 | C | 33 (1 health) | $427K |
| 36 | 06810 | Danbury | 59 | C | 9 (1 health) | $351K |
| 37 | 06850 | Norwalk | 59 | C | 2 (1 health) | $563K |
| 38 | 06851 | Norwalk | 59 | C | 2 (1 health) | $565K |
| 39 | 06897 | Wilton | 59 | C | 2 | $891K |
| 40 | 06903 | Stamford | 59 | C | 40 (1 health) | $894K |
| 41 | 06905 | Stamford | 59 | C | 40 (1 health) | $609K |
| 42 | 06877 | Ridgefield | 58 | C | 4 | $799K |
| 43 | 06470 | Newtown | 57 | C | 62 (2 health) | $515K |
| 44 | 06611 | Trumbull | 57 | C | 4 | $495K |
| 45 | 06484 | Shelton | 55 | C | 19 (2 health) | $436K |
| 46 | 06830 | Greenwich | 55 | C | 0 | $1686K |
| 47 | 06831 | Greenwich | 55 | C | 0 | $1484K |
| 48 | 06853 | Norwalk | 54 | D | 2 (1 health) | $1402K |
| 49 | 06854 | Norwalk | 54 | D | 2 (1 health) | $453K |
| 50 | 06855 | Norwalk | 54 | D | 2 (1 health) | $492K |
| 51 | 06902 | Stamford | 54 | D | 40 (1 health) | $515K |
| 52 | 06404 | Botsford | 53 | D | 0 | — |
| 53 | 06482 | Sandy Hook | 51 | D | 35 | $465K |
| 54 | 06825 | Fairfield | 51 | D | 8 (1 health) | $601K |
| 55 | 06824 | Fairfield | 46 | D | 8 (1 health) | $827K |
| 56 | 06418 | Derby | 45 | D | 0 | $244K |
| 57 | 06612 | Easton | 45 | D | 0 | $727K |
| 58 | 06896 | Redding | 45 | D | 0 | $686K |
| 59 | 06440 | Hawleyville | 40 | D | 0 | — |
| 60 | 06491 | Stevenson | 40 | D | 0 | — |
| 61 | 06614 | Stratford | 40 | D | 0 | $343K |
| 62 | 06807 | Cos Cob | 40 | D | 0 | $1228K |
| 63 | 06875 | Redding Center | 40 | D | 0 | — |
| 64 | 06876 | Redding Ridge | 40 | D | 0 | — |
| 65 | 06888 | Westport | 40 | D | 0 | — |
Recommended Buyer Guides for Fairfield County
Filtered against federal data, fitted to local risks.
- 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
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Fairfield County, Connecticut
Overview
Fairfield County in Connecticut covers 65 ZIP codes with an average Home Safety Score of C (58/100).
50 of 65 ZIP codes have recorded EPA violations. 44 health-based violations have been documented.
← Back to Connecticut 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.