A86/100
HILLSIDE — Water Quality Report 2026
Serving 8,200 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0311230
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
No violations in the past 5 years
Full EPA compliance since 2013.
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 HILLSIDE
Is HILLSIDE water safe to drink?
HILLSIDE water receives a grade of A (86/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has HILLSIDE detected?
31 contaminants were tested in HILLSIDE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does HILLSIDE have any EPA violations?
Yes, HILLSIDE has 7 EPA violation(s) on record, with the most recent in 2013. Violation types include Other, MR, MCL. 1 are health-based violations.
How many people does HILLSIDE serve?
HILLSIDE serves approximately 8,200 people, Illinois. The system provides water to 1 community: Hillside.
What type of water does HILLSIDE provide?
HILLSIDE 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 IL0311230.
How does HILLSIDE compare to other utilities in Illinois?
HILLSIDE 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.