What's in WINTERSET MUNICIPAL WATERWORKS's water?
WINTERSET MUNICIPAL WATERWORKS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 5,428 people get their water from it, across 2,600 connections.
Ranked against every other system in this dataset
WINTERSET MUNICIPAL WATERWORKS has 31 violations on record in total, 20 of thems health-based - ranking it 897th of 12,903 systems by violation count, the 93th percentile nationally.
How WINTERSET MUNICIPAL WATERWORKS compares within IA
IA's 203 covered systems average 3.5 health-based violations each; WINTERSET MUNICIPAL WATERWORKS carries 20, more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for WINTERSET MUNICIPAL WATERWORKS is from 2018-01-10 (health-based: 2018-01-10). Last reported to EPA: 06/17/2026.
What kind of problem, specifically
WINTERSET MUNICIPAL 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:
- Microbial contamination / treatment technique - flagged from: Long Term 2 Enhanced Surface Water Treatment Rule
- Nitrate / nitrite - flagged from: Nitrate
- Disinfection byproducts - flagged from: TTHM
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What this data is and is not
This is what WINTERSET MUNICIPAL 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 WINTERSET MUNICIPAL WATERWORKS's customers' taps is household plumbing, invisible to a system-level record ranked 897th of 12,903 by violation count. The guide to what this data misses covers that gap.