A96/100
LA GRANGE HIGHLANDS SANITARY DISTRICT — Water Quality Report 2026
Serving 6,600 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0315860
Violations
4
Contaminant Test Results
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
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 HIGHLANDS SANITARY DISTRICT
Is LA GRANGE HIGHLANDS SANITARY DISTRICT water safe to drink?
LA GRANGE HIGHLANDS SANITARY DISTRICT water receives a grade of A (96/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has LA GRANGE HIGHLANDS SANITARY DISTRICT detected?
31 contaminants were tested in LA GRANGE HIGHLANDS SANITARY DISTRICT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does LA GRANGE HIGHLANDS SANITARY DISTRICT have any EPA violations?
Yes, LA GRANGE HIGHLANDS SANITARY DISTRICT has 4 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR.
How many people does LA GRANGE HIGHLANDS SANITARY DISTRICT serve?
LA GRANGE HIGHLANDS SANITARY DISTRICT serves approximately 6,600 people, Illinois.
What type of water does LA GRANGE HIGHLANDS SANITARY DISTRICT provide?
LA GRANGE HIGHLANDS SANITARY DISTRICT 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 IL0315860.
How does LA GRANGE HIGHLANDS SANITARY DISTRICT compare to other utilities in Illinois?
LA GRANGE HIGHLANDS SANITARY DISTRICT scores 96/100 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.