What's in OCONTO WATERWORKS's water?
OCONTO 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 4,583 people through 2,041 service connections.
Ranked against every other system in this dataset
9 total violations and 3 health-based ones put OCONTO WATERWORKS at the 59th percentile nationally for violation burden, rank 5,339 of 12,903.
How OCONTO WATERWORKS compares within WI
WI's 202 covered systems average 3.6 health-based violations each; OCONTO WATERWORKS carries 3, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for OCONTO WATERWORKS is from 2025-05-10 (health-based: 2025-05-10). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
OCONTO 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:
- Lead & copper - flagged from: LEAD AND COPPER RULE REVISIONS
- Radionuclides - flagged from: Combined Radium (-226 and -228)
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
This is what OCONTO 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 - 3 health-based violations on file for OCONTO 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.