Neighborhood Report
Grade D
Janesville, WI Neighborhood Water Quality — Grade D
4 ZIP codes · 20 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across Janesville, WI. We analyzed 4 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade D (50/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 0 | 0% |
| C | 0 | 0% |
| D | 4 | 100% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Janesville ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 53546 | 52 | D | 5 | 0.0100 mg/L |
| 2 | 53548 | 52 | D | 5 | 0.0100 mg/L |
| 3 | 53547 | 49 | D | 5 | 0.0100 mg/L |
| 4 | 53545 | 47 | D | 5 | 0.0100 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 0 neighborhoods score better than county average
- 4 neighborhoods score worse than county average
EPA Violations
- 20 total violations across Janesville
- 4 health-based violations
- 4 of 4 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Surface Water Treatment Rule | 8 | 4 |
| Stage 1 DBP Rule | 4 | 4 |
| Stage 2 DBP Rule | 4 | 4 |
| Lead and Copper Rule | 4 | 4 |
Frequently Asked Questions
What is the safest neighborhood in Janesville?
ZIP code 53546 has the highest safety score in Janesville at 52/100 (grade D). Check the full report for details.
Is Janesville water safe to drink?
Janesville has an average water safety score of 50/100 (D). 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.