La Crosse Waterworks, WI Water Quality
What's in La Crosse Waterworks's water?
La Crosse 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: 53,000, over 16,176 connections.
How this compares nationally
La Crosse Waterworks has 25 violations on record in total, 3 of them health-based - ranking it 4,973th of 12,903 systems by violation count, the 61th percentile nationally.
Against the WI average
Among the 259 WI systems in this dataset, the average is 5.4 health-based violations - La Crosse Waterworks's 3 is at or below that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
La Crosse Waterworks's most recent violation on record is dated 2023-01-04, with the most recent health-based one dated 2014-04-03. Last reported to EPA: 05/29/2026.
The concern categories on record
La Crosse 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 La Crosse Waterworks's record does not cover
This is what La Crosse 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 La Crosse Waterworks's customers' taps is household plumbing, invisible to a system-level record ranked 4,973th of 12,903 by violation count. The guide to what this data misses covers that gap.