What's in PALOS HILLS's water?
PALOS HILLS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 18,530, over 6,500 connections.
How this compares nationally
6 total violations and 3 health-based ones put PALOS HILLS at the 58th percentile nationally for violation burden, rank 5,475 of 12,903.
Against the IL average
Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - PALOS HILLS's 3 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
PALOS HILLS's most recent violation on record is dated 2022-06-12, with the most recent health-based one dated 2000-01-10. Last reported to EPA: 05/27/2026.
The concern categories on record
PALOS 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 PALOS HILLS's record does not cover
PALOS HILLS's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 6 logged violations can see. The guide to what this data misses covers that gap.