Tinley Park, IL Water Quality
What's in Tinley Park's water?
Tinley Park's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. 56,703 people get their water from it, across 20,816 connections.
Tinley Park's record against the rest of the country
Tinley Park has 12 violations on record in total, 0 of them health-based - ranking it 10,304th of 12,903 systems by violation count, the 20th percentile nationally.
Against the IL average
Among the 572 IL systems in this dataset, the average is 5.1 health-based violations - Tinley Park's 0 is at or below that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
Tinley Park's most recent violation on record is dated 2025-02-07. Last reported to EPA: 05/27/2026.
What Tinley Park's record does not cover
Everything on this page is Tinley Park's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 0 health-based violations on file for Tinley Park - 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.