What's in SHELBY CITY OF's water?

SHELBY CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 3,970, over 1,233 connections.

Ranked against every other system in this dataset

26 total violations and 6 health-based ones put SHELBY CITY OF at the 76th percentile nationally for violation burden, rank 3,061 of 12,903.

How SHELBY CITY OF compares within MT

MT's 59 covered systems average 6.7 health-based violations each; SHELBY CITY OF carries 6, not more than typical for the state. 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 SHELBY CITY OF is from 2024-01-10 (health-based: 2012-01-09). Last reported to EPA: 06/29/2026.

What kind of problem, specifically

SHELBY CITY OF'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: Coliform (TCR)

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

SHELBY CITY OF'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 26 logged violations can see. The guide to what this data misses covers that gap.