Rochester, IL Water Quality
What's in Rochester's water?
Rochester's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. Population served: 3,856, over 1,752 connections.
Ranked against every other system in this dataset
Rochester has 15 violations on record in total, 0 of them health-based - ranking it 10,187th of 12,903 systems by violation count, the 21th percentile nationally.
How Rochester compares within IL
Rochester's 0 health-based violations sit within the IL average of 5.1, across 572 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for Rochester is from 2023-01-10. Last reported to EPA: 05/27/2026.
What this data is and is not
This is what Rochester 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 Rochester's customers' taps is household plumbing, invisible to a system-level record ranked 10,187th of 12,903 by violation count. The guide to what this data misses covers that gap.