Mukwonago Waterworks, WI Water Quality
What's in Mukwonago Waterworks's water?
Mukwonago Waterworks has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 8,190 people through 3,033 service connections.
How this compares nationally
Mukwonago Waterworks has 109 violations on record in total, 15 of them health-based - ranking it 1,215th of 12,903 systems by violation count, the 91th percentile nationally.
How Mukwonago Waterworks compares within WI
Among the 259 WI systems in this dataset, the average is 5.4 health-based violations - Mukwonago Waterworks's 15 is above that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for Mukwonago Waterworks is from 2015-01-10 (health-based: 2001-01-01). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
Mukwonago 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:
- Radionuclides - flagged from: Combined Radium (-226 and -228); Gross Alpha, Excl. Radon and U
The most severe category on record is radionuclides, which points toward a reverse osmosis-class filter if you want to address it directly.
What this data is and is not
This is what Mukwonago 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. This record - 15 health-based violations on file for Mukwonago Waterworks - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.