Denmark Waterworks, WI Water Quality
What's in Denmark Waterworks's water?
Denmark 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: 2,684, over 976 connections.
How this compares nationally
Out of 12,903 systems in this dataset, Denmark Waterworks ranks 4,255th by violation burden (67th percentile) - 16 violations total, 4 health-based.
How Denmark Waterworks compares within WI
Denmark Waterworks's 4 health-based violations sit within the WI average of 5.4, across 259 systems statewide. 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 Denmark Waterworks is from 2026-01-03 (health-based: 2025-05-10). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
Denmark 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; Lead and Copper Rule
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
Everything on this page is Denmark Waterworks's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 4 health-based violations on file for Denmark 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.