A86/100
LA GRANGE — Water Quality Report 2026
Serving 16,200 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0311530
Violations
7
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
4
Violations (last 5yr)
3
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Surface water treatment technique failure
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – February 21, 2024Enforcement: Resolving — corrective action underway
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
Is LA GRANGE water safe to drink?
LA GRANGE water receives a grade of A (86/100), which is considered excellent. Out of 76 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 detected?
76 contaminants were tested in LA GRANGE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does LA GRANGE have any EPA violations?
Yes, LA GRANGE has 7 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other, MR. 1 are health-based violations.
How many people does LA GRANGE serve?
LA GRANGE serves approximately 16,200 people, Illinois. The system provides water to 1 community: La Grange.
What type of water does LA GRANGE provide?
LA GRANGE 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 IL0311530.
How does LA GRANGE compare to other utilities in Illinois?
LA GRANGE scores 86/100 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.