A93/100
HICKORY HILLS — Water Quality Report 2026
Serving 14,505 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0311200
Violations
3
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1992.
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 HICKORY HILLS
Is HICKORY HILLS water safe to drink?
HICKORY HILLS water receives a grade of A (93/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has HICKORY HILLS detected?
69 contaminants were tested in HICKORY HILLS's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does HICKORY HILLS have any EPA violations?
Yes, HICKORY HILLS has 3 EPA violation(s) on record, with the most recent in 1992. Violation types include MR, MCL. 1 are health-based violations.
How many people does HICKORY HILLS serve?
HICKORY HILLS serves approximately 14,505 people, Illinois. The system provides water to 1 community: Hickory Hills.
What type of water does HICKORY HILLS provide?
HICKORY 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 IL0311200.
How does HICKORY HILLS compare to other utilities in Illinois?
HICKORY HILLS scores 93/100 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.