A91/100
MONTICELLO — Water Quality Report 2026
Serving 5,548 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1470350
Violations
1
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.40 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1977.
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 MONTICELLO
Is MONTICELLO water safe to drink?
MONTICELLO water receives a grade of A (91/100), which is considered excellent. Out of 32 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MONTICELLO detected?
32 contaminants were tested in MONTICELLO's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does MONTICELLO have any EPA violations?
Yes, MONTICELLO has 1 EPA violation(s) on record, with the most recent in 1977. Violation types include MR.
How many people does MONTICELLO serve?
MONTICELLO serves approximately 5,548 people, Illinois. The system provides water to 1 community: Monticello.
What type of water does MONTICELLO provide?
MONTICELLO sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1470350.
How does MONTICELLO compare to other utilities in Illinois?
MONTICELLO scores 91/100 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.