Is OAK FOREST's water safe to drink?

OAK FOREST's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. 27,478 people get their water from it, across 8,497 connections.

How this compares nationally

OAK FOREST has 10 violations on record in total, 0 of thems health-based - ranking it 10,441th of 12,903 systems by violation count, the 19th percentile nationally.

How OAK FOREST compares within IL

Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - OAK FOREST's 0 is at or below that. See the lead and copper guide for why lead counts differently.

Most recent violation on record

The last violation EPA has on record for OAK FOREST is from 2025-02-07. Last reported to EPA: 05/27/2026.

What this data is and is not

OAK FOREST'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. This record - 0 health-based violations on file for OAK FOREST - 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.