C56/100
WARRENSBURG — Water Quality Report 2026
Serving 1,230 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1150500
Violations
17
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.90 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.007 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
3
Unresolved
1
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: August 22, 2025 – August 28, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Treatment technique violation
When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 WARRENSBURG
Is WARRENSBURG water safe to drink?
WARRENSBURG water receives a grade of C (56/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 17 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WARRENSBURG detected?
2 contaminants were tested in WARRENSBURG's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does WARRENSBURG have any EPA violations?
Yes, WARRENSBURG has 17 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, RPT, TT. 4 are health-based violations.
How many people does WARRENSBURG serve?
WARRENSBURG serves approximately 1,230 people, Illinois. The system provides water to 1 community: Warrensburg.
What type of water does WARRENSBURG provide?
WARRENSBURG sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1150500.
How does WARRENSBURG compare to other utilities in Illinois?
WARRENSBURG scores 56/100 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.