A88/100
MOUNT STERLING — Water Quality Report 2026
Serving 3,271 people · Illinois
Water Source
Purchased Groundwater
County
—
System ID
IL0090100
Violations
8
Contaminant Test Results
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 MOUNT STERLING
Is MOUNT STERLING water safe to drink?
MOUNT STERLING water receives a grade of A (88/100), which is considered excellent. Out of 8 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has MOUNT STERLING detected?
8 contaminants were tested in MOUNT STERLING's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does MOUNT STERLING have any EPA violations?
Yes, MOUNT STERLING has 8 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 MOUNT STERLING serve?
MOUNT STERLING serves approximately 3,271 people, Illinois. The system provides water to 1 community: Mount Sterling.
What type of water does MOUNT STERLING provide?
MOUNT STERLING sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0090100.
How does MOUNT STERLING compare to other utilities in Illinois?
MOUNT STERLING scores 88/100 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.