What's in HARWOOD HEIGHTS's water?
HARWOOD HEIGHTS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 9,065, over 2,290 connections.
HARWOOD HEIGHTS's record against the rest of the country
Out of 12,903 systems in this dataset, HARWOOD HEIGHTS ranks 5,283th by violation burden (59th percentile) - 10 violations total, 3 health-baseds.
How HARWOOD HEIGHTS compares within IL
IL's 560 covered systems average 5.0 health-based violations each; HARWOOD HEIGHTS carries 3, not more than typical for the state. 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 HARWOOD HEIGHTS is from 2022-06-12 (health-based: 1994-01-09). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
HARWOOD HEIGHTS'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)
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
This is what HARWOOD HEIGHTS 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 HARWOOD HEIGHTS's customers' taps is household plumbing, invisible to a system-level record ranked 5,283th of 12,903 by violation count. The guide to what this data misses covers that gap.