Neighborhood Report
Grade B
Naperville, IL Neighborhood Water Quality — Grade B
6 ZIP codes · 6 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across Naperville, IL. We analyzed 6 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade B (72/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 4 | 67% |
| C | 2 | 33% |
| D | 0 | 0% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Naperville ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 60566 | 77 | B | 1 | 0.0074 mg/L |
| 2 | 60567 | 75 | B | 1 | 0.0074 mg/L |
| 3 | 60563 | 72 | B | 1 | 0.0074 mg/L |
| 4 | 60564 | 72 | B | 1 | 0.0074 mg/L |
| 5 | 60540 | 67 | C | 1 | 0.0074 mg/L |
| 6 | 60565 | 67 | C | 1 | 0.0074 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 4 neighborhoods score better than county average
- 2 neighborhoods score worse than county average
EPA Violations
- 6 total violations across Naperville
- 0 health-based violations
- 6 of 6 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Total Trihalomethanes (TTHM) | 6 | 6 |
Frequently Asked Questions
What is the safest neighborhood in Naperville?
ZIP code 60566 has the highest safety score in Naperville at 77/100 (grade B). Check the full report for details.
Is Naperville water safe to drink?
Naperville has an average water safety score of 72/100 (B). 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.