What's in OTTUMWA WATER WORKS's water?
OTTUMWA WATER WORKS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 25,529 people get their water from it, across 9,800 connections.
OTTUMWA WATER WORKS's record against the rest of the country
26 total violations and 4 health-based ones put OTTUMWA WATER WORKS at the 68th percentile nationally for violation burden, rank 4,137 of 12,903.
How OTTUMWA WATER WORKS compares within IA
OTTUMWA WATER WORKS's 4 health-based violations sit above the IA average of 3.5, across 203 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 OTTUMWA WATER WORKS is from 2024-01-01 (health-based: 2009-01-03). Last reported to EPA: 06/17/2026.
What kind of problem, specifically
OTTUMWA WATER WORKS'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: Coliform (TCR)
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 OTTUMWA WATER WORKS 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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 26 logged violations can see. The guide to what this data misses covers that gap.