A82/100
IL AMERICAN-DUPAGE UTILITY — Water Quality Report 2026
Serving 6,613 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0430552
Violations
6
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2008.
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 IL AMERICAN-DUPAGE UTILITY
Is IL AMERICAN-DUPAGE UTILITY water safe to drink?
IL AMERICAN-DUPAGE UTILITY water receives a grade of A (82/100), which is considered excellent. Out of 21 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has IL AMERICAN-DUPAGE UTILITY detected?
21 contaminants were tested in IL AMERICAN-DUPAGE UTILITY's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does IL AMERICAN-DUPAGE UTILITY have any EPA violations?
Yes, IL AMERICAN-DUPAGE UTILITY has 6 EPA violation(s) on record, with the most recent in 2008. Violation types include MR, MCL. 3 are health-based violations.
How many people does IL AMERICAN-DUPAGE UTILITY serve?
IL AMERICAN-DUPAGE UTILITY serves approximately 6,613 people, Illinois.
What type of water does IL AMERICAN-DUPAGE UTILITY provide?
IL AMERICAN-DUPAGE UTILITY 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 IL0430552.
How does IL AMERICAN-DUPAGE UTILITY compare to other utilities in Illinois?
IL AMERICAN-DUPAGE UTILITY scores 82/100 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.