NORTHLAKE: EPA violation history, explained

NORTHLAKE has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 12,840 people get their water from it, across 3,093 connections.

Ranked against every other system in this dataset

Out of 12,903 systems in this dataset, NORTHLAKE ranks 8,449th by violation burden (35th percentile) - 7 violations total, 1 health-based.

Against the IL average

Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - NORTHLAKE's 1 is at or below that. The clean-record guide covers what a comparison like this can hide.

Most recent violation on record

NORTHLAKE's most recent violation on record is dated 2026-01-01, with the most recent health-based one dated 2002-01-02. Last reported to EPA: 05/27/2026.

The concern categories on record

NORTHLAKE'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 NORTHLAKE's record does not cover

This is what NORTHLAKE 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. Between the utility's meter and NORTHLAKE's customers' taps is household plumbing, invisible to a system-level record ranked 8,449th of 12,903 by violation count. The guide to what this data misses covers that gap.