NORTH SIOUX CITY: EPA violation history, explained

NORTH SIOUX CITY's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. Population served: 3,042, over 1,249 connections.

How this compares nationally

Out of 12,903 systems in this dataset, NORTH SIOUX CITY ranks 9,727th by violation burden (25th percentile) - 35 violations total, 0 health-baseds.

Against the SD average

NORTH SIOUX CITY's 0 health-based violations sit within the SD average of 3.0, across 74 systems statewide. The clean-record guide covers what a comparison like this can hide.

Most recent violation on record

NORTH SIOUX CITY's most recent violation on record is dated 2008-01-01. Last reported to EPA: 06/17/2026.

What NORTH SIOUX CITY's record does not cover

NORTH SIOUX CITY's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 35 logged violations can see. The guide to what this data misses covers that gap.