A96/100
COLUMBIA — Water Quality Report 2026
Serving 11,129 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL1330050
Violations
4
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
TIER 3Unresolved
Surface water treatment technique failure
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 COLUMBIA
Is COLUMBIA water safe to drink?
COLUMBIA water receives a grade of A (96/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has COLUMBIA detected?
31 contaminants were tested in COLUMBIA's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does COLUMBIA have any EPA violations?
Yes, COLUMBIA has 4 EPA violation(s) on record, with the most recent in 2025. Violation types include Other.
How many people does COLUMBIA serve?
COLUMBIA serves approximately 11,129 people, Illinois. The system provides water to 1 community: Columbia.
What type of water does COLUMBIA provide?
COLUMBIA sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL1330050.
How does COLUMBIA compare to other utilities in Illinois?
COLUMBIA scores 96/100 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.