Decorah Water Department, IA Water Quality
Decorah Water Department: EPA violation history, explained
Decorah Water Department's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. 7,615 people get their water from it, across 2,800 connections.
Ranked against every other system in this dataset
Decorah Water Department has 6 violations on record in total, 0 of them health-based - ranking it 10,968th of 12,903 systems by violation count, the 15th percentile nationally.
Against the IA average
Decorah Water Department's 0 health-based violations sit within the IA average of 3.5, across 203 systems statewide. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
Decorah Water Department's most recent violation on record is dated 2010-01-01. Last reported to EPA: 06/17/2026.
What Decorah Water Department's record does not cover
Everything on this page is Decorah Water Department's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 0 health-based violations on file for Decorah Water Department - 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.