C45/100
MOUNT CARROLL — Water Quality Report 2026
Serving 1,479 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0150200
Violations
20
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2019.
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 MOUNT CARROLL
Is MOUNT CARROLL water safe to drink?
MOUNT CARROLL water receives a grade of C (45/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 20 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MOUNT CARROLL detected?
1 contaminants were tested in MOUNT CARROLL's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MOUNT CARROLL have any EPA violations?
Yes, MOUNT CARROLL has 20 EPA violation(s) on record, with the most recent in 2019. Violation types include MR, MCL, Other. 8 are health-based violations.
How many people does MOUNT CARROLL serve?
MOUNT CARROLL serves approximately 1,479 people, Illinois. The system provides water to 1 community: Mount Carroll.
What type of water does MOUNT CARROLL provide?
MOUNT CARROLL sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0150200.
How does MOUNT CARROLL compare to other utilities in Illinois?
MOUNT CARROLL scores 45/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Illinois state page for a full comparison of water systems.