LA SALLE — Water Quality Report 2026
Serving 9,700 people · Illinois
Contaminant Test Results
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.40 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.011 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
6
Violations (last 5yr)
0
Unresolved
3
Health-Related
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Exceeded the Maximum Contaminant Level (running average)
Exceeded the Maximum Contaminant Level (running average)
Exceeded the Maximum Contaminant Level (running average)
Understanding violation severity
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly