COLONA WEST: EPA violation history, explained

COLONA WEST's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. It serves 2,640 people through 1,056 service connections.

COLONA WEST's record against the rest of the country

Out of 12,903 systems in this dataset, COLONA WEST ranks 9,910th by violation burden (23th percentile) - 25 violations total, 0 health-baseds.

Against the IL average

Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - COLONA WEST's 0 is at or below that. See the lead and copper guide for why lead counts differently.

Most recent violation on record

COLONA WEST's most recent violation on record is dated 2007-01-07. Last reported to EPA: 05/27/2026.

What COLONA WEST's record does not cover

This is what COLONA WEST 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 COLONA WEST's customers' taps is household plumbing, invisible to a system-level record ranked 9,910th of 12,903 by violation count. The guide to what this data misses covers that gap.