What's in CHATHAM's water?

CHATHAM has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 16,423, over 6,569 connections.

CHATHAM's record against the rest of the country

CHATHAM has 14 violations on record in total, 2 of thems health-based - ranking it 6,368th of 12,903 systems by violation count, the 51th percentile nationally.

Against the IL average

Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - CHATHAM's 2 is at or below that. See the lead and copper guide for why lead counts differently.

Most recent violation on record

CHATHAM's most recent violation on record is dated 2017-01-01, with the most recent health-based one dated 2005-01-07. Last reported to EPA: 05/27/2026.

The concern categories on record

CHATHAM'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 CHATHAM's record does not cover

This is what CHATHAM reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 14 logged violations can see. The guide to what this data misses covers that gap.