A84/100
AQUA ILLINOIS-OAK RUN — Water Quality Report 2026
Serving 1,885 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0955200
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1995.
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 AQUA ILLINOIS-OAK RUN
Is AQUA ILLINOIS-OAK RUN water safe to drink?
AQUA ILLINOIS-OAK RUN water receives a grade of A (84/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has AQUA ILLINOIS-OAK RUN detected?
1 contaminants were tested in AQUA ILLINOIS-OAK RUN's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does AQUA ILLINOIS-OAK RUN have any EPA violations?
Yes, AQUA ILLINOIS-OAK RUN has 5 EPA violation(s) on record, with the most recent in 1995. Violation types include MR, MCL. 2 are health-based violations.
How many people does AQUA ILLINOIS-OAK RUN serve?
AQUA ILLINOIS-OAK RUN serves approximately 1,885 people, Illinois.
What type of water does AQUA ILLINOIS-OAK RUN provide?
AQUA ILLINOIS-OAK RUN sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0955200.
How does AQUA ILLINOIS-OAK RUN compare to other utilities in Illinois?
AQUA ILLINOIS-OAK RUN scores 84/100 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.