Neighborhood Report
Grade D
Joliet, IL Neighborhood Water Quality — Grade D
6 ZIP codes · 306 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across Joliet, IL. We analyzed 6 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade D (49/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 0 | 0% |
| C | 1 | 17% |
| D | 5 | 83% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Joliet ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 60434 | 59 | C | 51 | 0.0070 mg/L |
| 2 | 60431 | 49 | D | 51 | 0.0070 mg/L |
| 3 | 60435 | 49 | D | 51 | 0.0070 mg/L |
| 4 | 60436 | 49 | D | 51 | 0.0070 mg/L |
| 5 | 60432 | 44 | D | 51 | 0.0070 mg/L |
| 6 | 60433 | 44 | D | 51 | 0.0070 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 0 neighborhoods score better than county average
- 6 neighborhoods score worse than county average
EPA Violations
- 306 total violations across Joliet
- 42 health-based violations
- 6 of 6 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Stage 2 DBP Rule | 54 | 6 |
| Surface Water Treatment Rule | 48 | 6 |
| Total Trihalomethanes (TTHM) | 42 | 6 |
| Lead and Copper Rule | 42 | 6 |
| Revised Total Coliform Rule | 42 | 6 |
Frequently Asked Questions
What is the safest neighborhood in Joliet?
ZIP code 60434 has the highest safety score in Joliet at 59/100 (grade C). Check the full report for details.
Is Joliet water safe to drink?
Joliet has an average water safety score of 49/100 (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.