Is COLUMBIA's water safe to drink?

COLUMBIA's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. It serves 11,129 people through 4,117 service connections.

Ranked against every other system in this dataset

Out of 12,903 systems in this dataset, COLUMBIA ranks 11,360th by violation burden (12th percentile) - 4 violations total, 0 health-baseds.

Against the IL average

IL's 560 covered systems average 5.0 health-based violations each; COLUMBIA carries 0, not more than typical for the state. The filter guide explains what a violation like this actually calls for.

Most recent violation on record

COLUMBIA's most recent violation on record is dated 2025-01-07. Last reported to EPA: 05/27/2026.

What COLUMBIA's record does not cover

This is what COLUMBIA reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Between the utility's meter and COLUMBIA's customers' taps is household plumbing, invisible to a system-level record ranked 11,360th of 12,903 by violation count. The guide to what this data misses covers that gap.