Lead Exceeds EPA Action Level in 4 Areas - Naperville, IL
6 ZIP codes · 24 EPA violations on record for mapped water systems
Data source: ZipCheckup Home Safety Score registry; EPA SDWIS; EPA radon; EPA AirNow
ZipCheckup compares 6 ZIP codes across Naperville, IL. The area averages a grade B (81/100); water systems associated with 4 ZIP codes have recorded EPA violations.
Home-safety conditions vary across Naperville, IL. We compared 6 ZIP codes using the current versioned Home Safety Score. Water compliance remains one component alongside PFAS screening, radon, and annual air quality.
City Overview: Grade B (81/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 4 | 100% |
| C | 0 | 0% |
| D | 0 | 0% |
| F | 0 | 0% |
Neighborhood Rankings
Mapped ZIP codes in Naperville ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 60540 | 81 | B | 17 | Above EPA action level |
| 2 | 60564 | 81 | B | 18 | Above EPA action level |
| 3 | 60565 | 81 | B | 17 | Above EPA action level |
| 4 | 60563 | 79 | B | 21 | Above EPA action level |
| 5 | 60566 | — | — | — | No data |
| 6 | 60567 | — | — | — | No data |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 4 neighborhoods score better than county average
- 0 neighborhoods score worse than county average
EPA Violations
- 24 total violations since 2021 across the water systems mapped to Naperville ZIP codes (each system counted once; includes small systems beyond the city utility)
- 0 health-based violation records in the available EPA data
- 4 of 4 directly mapped ZIP records are mapped to water systems with recorded violations
- 4 of 4 ZIP records with known lead status are served by a system whose 90th-percentile lead result exceeded the EPA action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Consumer Confidence Rule | 6 | 4 |
| Endrin | 4 | 4 |
| BHC-gamma (Lindane) | 4 | 4 |
| Methoxychlor | 4 | 4 |
| Toxaphene | 4 | 4 |
Frequently Asked Questions
Which ZIP code in Naperville has the highest home safety score?
ZIP code 60540 has the highest safety score among scored ZIP codes in Naperville at 81/100 (grade B). Check the full report for details.
Is Naperville water safe to drink?
The Home Safety Score is not a drinking-water grade. Across 4 directly mapped ZIP records, 24 EPA violations are recorded; 4 of 4 records with known lead status exceed the action level. Check the specific ZIP and serving system before drawing a property-level conclusion.
Related Pages
Data Sources
- EPA SDWIS
- U.S. Census Bureau
Reporting periods vary by source; the page metadata identifies this materialization.