What's in SIOUX FALLS's water?
SIOUX FALLS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 216,462 people get their water from it, across 63,541 connections.
How this compares nationally
4 total violations and 1 health-based ones put SIOUX FALLS at the 32th percentile nationally for violation burden, rank 8,791 of 12,903.
How SIOUX FALLS compares within SD
SIOUX FALLS's 1 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
The last violation EPA has on record for SIOUX FALLS is from 2009-08-12 (health-based: 2009-08-12). Last reported to EPA: 06/17/2026.
What kind of problem, specifically
SIOUX FALLS'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: Stage 1 Disinfectants and Disinfection Byproducts Rule
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
Everything on this page is SIOUX FALLS's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 1 health-based violation on file for SIOUX FALLS - 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.