MASCOUTAH: EPA violation history, explained
MASCOUTAH has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 8,759, over 3,992 connections.
Ranked against every other system in this dataset
9 total violations and 4 health-based ones put MASCOUTAH at the 66th percentile nationally for violation burden, rank 4,437 of 12,903.
How MASCOUTAH compares within IL
IL's 560 covered systems average 5.0 health-based violations each; MASCOUTAH carries 4, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for MASCOUTAH is from 2025-01-07 (health-based: 2014-01-06). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
MASCOUTAH'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); Long Term 2 Enhanced Surface Water Treatment Rule
- Synthetic organic chemicals / pesticides / VOCs - flagged from: Atrazine
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 MASCOUTAH's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 9 logged violations can see. The guide to what this data misses covers that gap.