COTTAGE GROVE WATERWORKS: EPA violation history, explained
COTTAGE 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. Population served: 9,345, over 3,461 connections.
Ranked against every other system in this dataset
COTTAGE GROVE WATERWORKS has 7 violations on record in total, 2 of thems health-based - ranking it 6,708th of 12,903 systems by violation count, the 48th percentile nationally.
Against the WI average
Among the 202 WI systems in this dataset, the average is 3.6 health-based violations - COTTAGE GROVE WATERWORKS's 2 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
COTTAGE 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
COTTAGE 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
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What COTTAGE GROVE WATERWORKS's record does not cover
This is what COTTAGE 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 COTTAGE GROVE WATERWORKS's customers' taps is household plumbing, invisible to a system-level record ranked 6,708th of 12,903 by violation count. The guide to what this data misses covers that gap.