What's in UNION GROVE WATERWORKS's water?
UNION GROVE WATERWORKS had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 4,900 people get their water from it, across 1,814 connections.
How this compares nationally
23 total violations and 9 health-based ones put UNION GROVE WATERWORKS at the 83th percentile nationally for violation burden, rank 2,175 of 12,903.
Against the WI average
Among the 202 WI systems in this dataset, the average is 3.6 health-based violations - UNION GROVE WATERWORKS's 9 is above that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
UNION GROVE WATERWORKS's most recent violation on record is dated 2025-05-10, with the most recent health-based one dated 2025-05-10. Last reported to EPA: 05/29/2026.
The concern categories on record
UNION GROVE 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); Gross Alpha, Excl. Radon and U
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What UNION GROVE WATERWORKS's record does not cover
This is what UNION GROVE 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 UNION GROVE WATERWORKS's customers' taps is household plumbing, invisible to a system-level record ranked 2,175th of 12,903 by violation count. The guide to what this data misses covers that gap.