MARSHALLTOWN WATER WORKS: EPA violation history, explained

MARSHALLTOWN WATER WORKS's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. It serves 27,680 people through 9,812 service connections.

How this compares nationally

MARSHALLTOWN WATER WORKS has 4 violations on record in total, 0 of thems health-based - ranking it 11,320th of 12,903 systems by violation count, the 12th percentile nationally.

Against the IA average

Among the 203 IA systems in this dataset, the average is 3.5 health-based violations - MARSHALLTOWN WATER WORKS's 0 is at or below that. See the lead and copper guide for why lead counts differently.

Most recent violation on record

MARSHALLTOWN WATER WORKS's most recent violation on record is dated 1994-01-04. Last reported to EPA: 06/17/2026.

What MARSHALLTOWN WATER WORKS's record does not cover

This is what MARSHALLTOWN 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 4 logged violations can see. The guide to what this data misses covers that gap.