Prairie Du Chien Waterworks, WI Water Quality
Prairie Du Chien Waterworks: EPA violation history, explained
Prairie Du Chien 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: 6,005, over 2,224 connections.
How this compares nationally
Out of 12,903 systems in this dataset, Prairie Du Chien Waterworks ranks 3,525th by violation burden (73th percentile) - 28 violations total, 5 health-based.
How Prairie Du Chien Waterworks compares within WI
Prairie Du Chien Waterworks's 5 health-based violations sit within the WI average of 5.4, across 259 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for Prairie Du Chien Waterworks is from 2013-01-01 (health-based: 2013-01-01). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
Prairie Du Chien 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); Groundwater Rule
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 Prairie Du Chien 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. Between the utility's meter and Prairie Du Chien Waterworks's customers' taps is household plumbing, invisible to a system-level record ranked 3,525th of 12,903 by violation count. The guide to what this data misses covers that gap.