Madison Water Utility, WI Water Quality
Is Madison Water Utility's water safe to drink?
Madison Water Utility 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: 272,000, over 100,740 connections.
Madison Water Utility's record against the rest of the country
Out of 12,903 systems in this dataset, Madison Water Utility ranks 3,986th by violation burden (69th percentile) - 71 violations total, 4 health-based.
How Madison Water Utility compares within WI
Madison Water Utility's 4 health-based violations sit within the WI average of 5.4, across 259 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for Madison Water Utility is from 2025-05-10 (health-based: 2025-05-10). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
Madison Water Utility'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
This is what Madison Water Utility 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 - 4 health-based violations on file for Madison Water Utility - 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.