A83/100
PALOS HILLS — Water Quality Report 2026
Serving 18,530 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0312400
Violations
5
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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 PALOS HILLS
Is PALOS HILLS water safe to drink?
PALOS HILLS water receives a grade of A (83/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has PALOS HILLS detected?
69 contaminants were tested in PALOS HILLS's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does PALOS HILLS have any EPA violations?
Yes, PALOS HILLS has 5 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, MCL. 3 are health-based violations.
How many people does PALOS HILLS serve?
PALOS HILLS serves approximately 18,530 people, Illinois. The system provides water to 1 community: Palos Hills.
What type of water does PALOS HILLS provide?
PALOS HILLS 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 IL0312400.
How does PALOS HILLS compare to other utilities in Illinois?
PALOS HILLS scores 83/100 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.