Tomah Waterworks, WI Water Quality
Tomah Waterworks: EPA violation history, explained
Tomah Waterworks had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 9,192 people through 3,139 service connections.
How this compares nationally
Out of 12,903 systems in this dataset, Tomah Waterworks ranks 1,029th by violation burden (92th percentile) - 25 violations total, 18 health-based.
Against the WI average
Among the 259 WI systems in this dataset, the average is 5.4 health-based violations - Tomah Waterworks's 18 is above that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
Tomah Waterworks's most recent violation on record is dated 2025-01-04, with the most recent health-based one dated 2025-01-04. Last reported to EPA: 05/29/2026.
The concern categories on record
Tomah 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
- Nitrate / nitrite - flagged from: Nitrate
- Synthetic organic chemicals / pesticides / VOCs - flagged from: Ethylene Dibromide
The most severe category on record is radionuclides, which points toward a reverse osmosis-class filter if you want to address it directly.
What Tomah Waterworks's record does not cover
This is what Tomah 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 25 logged violations can see. The guide to what this data misses covers that gap.