Is LISLE's water safe to drink?
LISLE has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 24,223, over 6,129 connections.
LISLE's record against the rest of the country
8 total violations and 2 health-based ones put LISLE at the 49th percentile nationally for violation burden, rank 6,635 of 12,903.
How LISLE compares within IL
LISLE's 2 health-based violations sit within the IL average of 5.0, across 560 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 LISLE is from 2025-01-07 (health-based: 2011-01-08). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
LISLE'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
Everything on this page is LISLE'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 8 logged violations can see. The guide to what this data misses covers that gap.