Willowbrook
PWSID: IL0431100
System Details
| Population Served | 9,000 |
| Service Connections | 2,207 |
| Water Source | Surface Water Purchased |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | Willowbrook |
| Zip Code | 60527 |
Areas Served
- Willowbrook, Dupage County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|
| Lead (90th percentile) | 0.0023 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0021 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0013 mg/L | 0.015 mg/L | Below Action Level |
2 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2025-07-02 | | Open |
| | 2025-07-01 | | Open |
Violation History (21 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2024-10-01 | Major | Acknowledged |
| | 2024-10-01 | Major | Acknowledged |
| | 2024-10-01 | Major | Returned to Compliance |
| | 2024-10-01 | Major | Returned to Compliance |
| | 2024-10-01 | Major | Acknowledged |
| | 2024-10-01 | Major | Acknowledged |
| | 2024-10-01 | Major | Returned to Compliance |
| | 2024-10-01 | Major | Returned to Compliance |
| | 2023-07-01 | | Returned to Compliance |
| | 2023-07-01 | | Returned to Compliance |
| | 2023-07-01 | | Returned to Compliance |
| | 2022-07-01 | | Returned to Compliance |
| | 2022-07-01 | | Returned to Compliance |
| | 2022-07-01 | | Returned to Compliance |
| | 2021-07-01 | | Returned to Compliance |
| | 2021-07-01 | | Returned to Compliance |
| | 2020-12-30 | | Returned to Compliance |
| | 2020-12-30 | | Returned to Compliance |
| | 2013-07-01 | | Returned to Compliance |