What's in HICKORY HILLS's water?
HICKORY HILLS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 14,505 people through 4,069 service connections.
HICKORY HILLS's record against the rest of the country
HICKORY HILLS has 4 violations on record in total, 1 of them health-based - ranking it 8,835th of 12,903 systems by violation count, the 32th percentile nationally.
Against the IL average
IL's 560 covered systems average 5.0 health-based violations each; HICKORY HILLS carries 1, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
HICKORY HILLS's most recent violation on record is dated 1992-01-10, with the most recent health-based one dated 1992-01-10. Last reported to EPA: 05/27/2026.
The concern categories on record
HICKORY HILLS'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 HICKORY HILLS's record does not cover
This is what HICKORY HILLS 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. This record - 1 health-based violation on file for HICKORY HILLS - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.