Vernon Hills - Lake Co Pw, IL Water Quality
Vernon Hills - Lake Co Pw: EPA violation history, explained
Vernon Hills - Lake Co Pw has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 33,207 people get their water from it, across 11,069 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, Vernon Hills - Lake Co Pw ranks 5,308th by violation burden (59th percentile) - 9 violations total, 3 health-based.
Against the IL average
Vernon Hills - Lake Co Pw's 3 health-based violations sit within the IL average of 5.1, across 572 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
Vernon Hills - Lake Co Pw's most recent violation on record is dated 2024-01-07, with the most recent health-based one dated 1994-01-08. Last reported to EPA: 05/27/2026.
The concern categories on record
Vernon Hills - Lake Co Pw'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)
- Radionuclides - flagged from: Combined Radium (-226 and -228)
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 Vernon Hills - Lake Co Pw's record does not cover
Vernon Hills - Lake Co Pw'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 9 logged violations can see. The guide to what this data misses covers that gap.