Eau Claire Waterworks, WI Water Quality
Eau Claire Waterworks: EPA violation history, explained
Eau Claire Waterworks has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 70,587, over 26,997 connections.
Eau Claire Waterworks's record against the rest of the country
Out of 12,903 systems in this dataset, Eau Claire Waterworks ranks 8,933th by violation burden (31th percentile) - 3 violations total, 1 health-based.
How Eau Claire Waterworks compares within WI
Eau Claire Waterworks's 1 health-based violations sit within the WI average of 5.4, across 259 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 Eau Claire Waterworks is from 1999-01-06 (health-based: 1999-01-06). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
Eau Claire Waterworks's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What this data is and is not
This is what Eau Claire Waterworks 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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 3 logged violations can see. The guide to what this data misses covers that gap.