A85/100
LA GRANGE PARK — Water Quality Report 2026
Serving 13,011 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0311560
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About LA GRANGE PARK
Is LA GRANGE PARK water safe to drink?
LA GRANGE PARK water receives a grade of A (85/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has LA GRANGE PARK detected?
69 contaminants were tested in LA GRANGE PARK's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does LA GRANGE PARK have any EPA violations?
Yes, LA GRANGE PARK has 4 EPA violation(s) on record, with the most recent in 2018. Violation types include Other, MCL, TT. 2 are health-based violations.
How many people does LA GRANGE PARK serve?
LA GRANGE PARK serves approximately 13,011 people, Illinois. The system provides water to 1 community: La Grange Park.
What type of water does LA GRANGE PARK provide?
LA GRANGE PARK sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL0311560.
How does LA GRANGE PARK compare to other utilities in Illinois?
LA GRANGE PARK scores 85/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Illinois state page for a full comparison of water systems.