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Water system · PWSID IL0430010

YORK TOWNSHIP WATER SYSTEM

DARIEN, IL · ~1,423 people served

Check your exact address → DARIEN overview
100
Excellent
PurityRadar safety score

PWSID

IL0430010

State

Illinois

City

DARIEN

Population served

1,423

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

45

Violations on record

1

Unaddressed

3

Health-based

41

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →

Other · EPA contaminant 7000 began Jul 2025 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Oct 2012 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2011 Resolved
Monitoring & reporting · Lead & Copper Rule began Apr 2011 Resolved
Monitoring & reporting · Nitrate began Jan 2011 Resolved
Other · EPA contaminant 7000 began Oct 2010 Resolved
Treatment technique · Lead & Copper Rule health-based began Aug 2009 Resolved
Other · EPA contaminant 7500 began Jan 2008 Resolved
Other · EPA contaminant 7500 began Jan 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Feb 2006 Resolved
Other · EPA contaminant 7000 began Oct 1999 Resolved

Recent enforcement actions

  • State action · SIA Sep 2025
  • State action · SOX Sep 2013
  • State action · SIF Jun 2013
  • State action · SIA Oct 2012
  • State action · SIE Oct 2012
  • State action · SIF Jul 2012
  • State action · SOX Feb 2012
  • State action · SIE Jan 2012

This profile is built from EPA public records for system IL0430010 — 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.