Crystal Lake
PWSID: IL1110150
System Details
| Population Served | 40,661 |
| Service Connections | 14,101 |
| Water Source | Groundwater |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | Crystal Lake |
| Zip Code | 60014 |
Areas Served
- Crystal Lake, Mchenry County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|
| Lead (90th percentile) | 0.0120 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0093 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0074 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0056 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0053 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) | 0.0047 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0038 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0000 mg/L | 0.015 mg/L | Below Action Level |
Violation History (23 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2025-04-01 | Major | Acknowledged |
| | 2024-04-01 | Major | Acknowledged |
| | 2024-04-01 | Major | Returned to Compliance |
| | 2024-04-01 | Major | Returned to Compliance |