OAK PARK

OAK PARK, IL · ~54,583 people served

Check your exact address → OAK PARK overview

100

Excellent

PurityRadar safety score

PWSID

IL0312250

State

Illinois

City

OAK PARK

Population served

54,583

Primary source

SWP

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 1999. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Apr 1997 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1997 Resolved

Treatment technique · Lead & Copper Rule health-based began Jan 1994 Resolved

Treatment technique · Lead & Copper Rule health-based began Dec 1992 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1992 Resolved

Recent enforcement actions

State action · SOX Apr 1999
State action · SOX Feb 1995
State action · SOX Jan 1994
State action · SOX Jan 1994
State action · SOX Sep 1993
State action · SIE Jan 1989
State action · SIA Jan 1989
State action · SIA Oct 1988

This profile is built from EPA public records for system IL0312250 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.