MATTOON: EPA violation history, explained

MATTOON has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 19,500 people through 8,000 service connections.

MATTOON's record against the rest of the country

MATTOON has 28 violations on record in total, 11 of thems health-based - ranking it 1,769th of 12,903 systems by violation count, the 86th percentile nationally.

Against the IL average

MATTOON's 11 health-based violations sit above the IL average of 5.0, across 560 systems statewide. See the lead and copper guide for why lead counts differently.

Most recent violation on record

MATTOON's most recent violation on record is dated 2023-01-04, with the most recent health-based one dated 1998-01-12. Last reported to EPA: 05/27/2026.

The concern categories on record

MATTOON'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); Surface Water Treatment 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 MATTOON's record does not cover

Everything on this page is MATTOON's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 11 health-based violations on file for MATTOON - 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.