A93/100
CENTRALIA — Water Quality Report 2026
Serving 12,182 people · Illinois
Water Source
Surface Water
County
—
System ID
IL1214220
Violations
4
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
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: July 11, 2024 – March 29, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2023 – June 30, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
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 CENTRALIA
Is CENTRALIA water safe to drink?
CENTRALIA water receives a grade of A (93/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CENTRALIA detected?
69 contaminants were tested in CENTRALIA's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CENTRALIA have any EPA violations?
Yes, CENTRALIA has 4 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR.
How many people does CENTRALIA serve?
CENTRALIA serves approximately 12,182 people, Illinois. The system provides water to 1 community: Centralia.
What type of water does CENTRALIA provide?
CENTRALIA sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL1214220.
How does CENTRALIA compare to other utilities in Illinois?
CENTRALIA scores 93/100 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.