Neighborhood Report
Grade C
Norwalk, CT Neighborhood Water Quality — Grade C
11 ZIP codes · 22 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across Norwalk, CT. We analyzed 11 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade C (61/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 0 | 0% |
| C | 8 | 73% |
| D | 3 | 27% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Norwalk ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 06852 | 69 | C | 2 | 0.0030 mg/L |
| 2 | 06857 | 65 | C | 2 | 0.0030 mg/L |
| 3 | 06858 | 65 | C | 2 | 0.0030 mg/L |
| 4 | 06859 | 65 | C | 2 | 0.0030 mg/L |
| 5 | 06860 | 65 | C | 2 | 0.0030 mg/L |
| 6 | 06856 | 64 | C | 2 | 0.0030 mg/L |
| 7 | 06850 | 59 | C | 2 | 0.0030 mg/L |
| 8 | 06851 | 59 | C | 2 | 0.0030 mg/L |
| 9 | 06853 | 54 | D | 2 | 0.0030 mg/L |
| 10 | 06854 | 54 | D | 2 | 0.0030 mg/L |
| 11 | 06855 | 54 | D | 2 | 0.0030 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 8 neighborhoods score better than county average
- 3 neighborhoods score worse than county average
EPA Violations
- 22 total violations across Norwalk
- 11 health-based violations
- 11 of 11 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Stage 1 DBP Rule | 11 | 11 |
| Contaminant 0700 | 11 | 11 |
Frequently Asked Questions
What is the safest neighborhood in Norwalk?
ZIP code 06852 has the highest safety score in Norwalk at 69/100 (grade C). Check the full report for details.
Is Norwalk water safe to drink?
Norwalk has an average water safety score of 61/100 (C). Water quality varies by neighborhood — no ZIP codes currently exceed EPA lead limits. Always check your specific ZIP code.
Related Pages
Data Sources
- EPA SDWIS
- U.S. Census Bureau
Updated daily.