B73/100
COLONA WEST — Water Quality Report 2026
Serving 2,640 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0730550
Violations
24
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2007.
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 COLONA WEST
Is COLONA WEST water safe to drink?
COLONA WEST water receives a grade of B (73/100), which is considered good. 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 COLONA WEST detected?
1 contaminants were tested in COLONA WEST's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does COLONA WEST have any EPA violations?
Yes, COLONA WEST has 24 EPA violation(s) on record, with the most recent in 2007. Violation types include Other, MR.
How many people does COLONA WEST serve?
COLONA WEST serves approximately 2,640 people, Illinois. The system provides water to 1 community: Green Rock.
What type of water does COLONA WEST provide?
COLONA WEST sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0730550.
How does COLONA WEST compare to other utilities in Illinois?
COLONA WEST scores 73/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Illinois state page for a full comparison of water systems.