ONAWA MUNICIPAL WATER PLANT: EPA violation history, explained

ONAWA MUNICIPAL WATER PLANT's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. It serves 2,906 people through 1,350 service connections.

How this compares nationally

ONAWA MUNICIPAL WATER PLANT has 2 violations on record in total, 0 of thems health-based - ranking it 12,152th of 12,903 systems by violation count, the 6th percentile nationally.

Against the IA average

ONAWA MUNICIPAL WATER PLANT's 0 health-based violations sit within 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

ONAWA MUNICIPAL WATER PLANT's most recent violation on record is dated 1988-01-04. Last reported to EPA: 06/17/2026.

What ONAWA MUNICIPAL WATER PLANT's record does not cover

Everything on this page is ONAWA MUNICIPAL WATER PLANT's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and ONAWA MUNICIPAL WATER PLANT's customers' taps is household plumbing, invisible to a system-level record ranked 12,152th of 12,903 by violation count. The guide to what this data misses covers that gap.