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Water system · PWSID IL0430900

WEST CHICAGO

WEST CHICAGO, IL · ~25,166 people served

Check your exact address → WEST CHICAGO overview
100
Excellent
PurityRadar safety score

PWSID

IL0430900

State

Illinois

City

WEST CHICAGO

Population served

25,166

Primary source

Groundwater

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2024). Levels in parts per trillion (ppt).

Lithium

36,800 ppt

limit —

No federal limit

Violations & enforcement

24

Violations on record

0

Unaddressed

22

Health-based

61

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2006. Official EPA record →

Max contaminant level (MCL) · Gross alpha health-based began Oct 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2005 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jul 2005 Resolved
Other · EPA contaminant 7500 began Apr 2005 Resolved
Other · EPA contaminant 7500 began Apr 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2005 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Apr 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2005 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jan 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2004 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2004 Resolved

Recent enforcement actions

  • State action · SIF Feb 2006
  • State action · SOX Jan 2006
  • State action · SIA Jan 2006
  • State action · SIE Jan 2006
  • State action · SIF Nov 2005
  • State action · SIA Oct 2005
  • State action · SIE Oct 2005
  • State action · SIE Jul 2005

This profile is built from EPA public records for system IL0430900 — 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.