Cary, IL Water Quality
What's in Cary's water?
Cary has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 17,826 people get their water from it, across 6,469 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, Cary ranks 1,806th by violation burden (86th percentile) - 19 violations total, 11 health-based.
How Cary compares within IL
Cary's 11 health-based violations sit above 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
The last violation EPA has on record for Cary is from 2025-01-07 (health-based: 1995-01-10). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
Cary'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:
- Lead & copper - flagged from: Lead and Copper Rule
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
- Radionuclides - flagged from: Combined Radium (-226 and -228); Gross Alpha, Excl. Radon and U
- Other regulated metals - flagged from: Barium
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
Everything on this page is Cary'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 Cary's customers' taps is household plumbing, invisible to a system-level record ranked 1,806th of 12,903 by violation count. The guide to what this data misses covers that gap.