Is NORTH CHICAGO's water safe to drink?
NORTH CHICAGO had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 16,813 people through 4,211 service connections.
Ranked against every other system in this dataset
36 total violations and 4 health-based ones put NORTH CHICAGO at the 68th percentile nationally for violation burden, rank 4,071 of 12,903.
Against the IL average
IL's 560 covered systems average 5.0 health-based violations each; NORTH CHICAGO carries 4, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
NORTH CHICAGO's most recent violation on record is dated 2025-08-06, with the most recent health-based one dated 2024-01-04. Last reported to EPA: 05/27/2026.
The concern categories on record
NORTH CHICAGO'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); Interim Enhanced Surface Water Treatment Rule
- Synthetic organic chemicals / pesticides / VOCs - flagged from: Di(2-ethylhexyl) phthalate
- Disinfection byproducts - flagged from: TTHM
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 NORTH CHICAGO's record does not cover
Everything on this page is NORTH CHICAGO's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and NORTH CHICAGO's customers' taps is household plumbing, invisible to a system-level record ranked 4,071th of 12,903 by violation count. The guide to what this data misses covers that gap.