What's in Winona's water?
Winona has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 27,782, over 8,417 connections.
Ranked against every other system in this dataset
Winona has 9 violations on record in total, 8 of thems health-based - ranking it 2,517th of 12,903 systems by violation count, the 80th percentile nationally.
Against the MN average
Winona's 8 health-based violations sit above the MN average of 0.8, across 254 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
Winona's most recent violation on record is dated 2021-01-07, with the most recent health-based one dated 2021-01-07. Last reported to EPA: 05/28/2026.
The concern categories on record
Winona'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:
- Radionuclides - flagged from: Combined Radium (-226 and -228)
The most severe category on record is radionuclides, which points toward a reverse osmosis-class filter if you want to address it directly.
What Winona's record does not cover
Winona's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Between the utility's meter and Winona's customers' taps is household plumbing, invisible to a system-level record ranked 2,517th of 12,903 by violation count. The guide to what this data misses covers that gap.