Oak Lawn
PWSID: IL0312220
System Details
| Population Served | 58,362 |
| Service Connections | 16,766 |
| Water Source | Surface Water Purchased |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | Oak Lawn |
| Zip Code | 60453 |
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|
| Lead (90th percentile) | 0.0116 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0106 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0069 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0059 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0051 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0044 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0028 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0003 mg/L | 0.015 mg/L | Below Action Level |
1 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2025-07-01 | | Open |
Violation History (11 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2023-07-01 | | Returned to Compliance |
| | 2023-07-01 | | Returned to Compliance |
| | 2023-07-01 | | Returned to Compliance |
| | 2022-12-30 | | Returned to Compliance |
| | 2022-12-30 | | Returned to Compliance |
| | 2022-12-30 | | Returned to Compliance |
| | 2016-07-01 | | Returned to Compliance |
| | 2016-07-01 | | Returned to Compliance |
| | 1993-01-01 | Yes | Returned to Compliance |
| | 1992-12-07 | Yes | Returned to Compliance |