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Water system · PWSID IL1570100

CHESTER

CHESTER, IL · ~8,407 people served

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

PWSID

IL1570100

State

Illinois

City

CHESTER

Population served

8,407

Primary source

Surface water

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 Dec 2024). Levels in parts per trillion (ppt).

Lithium

13,000 ppt

limit —

No federal limit

PFBA

8.3 ppt

limit —

No federal limit

PFBS

3.2 ppt

limit —

No federal limit

PFPeA

3.1 ppt

limit —

No federal limit

Violations & enforcement

13

Violations on record

0

Unaddressed

6

Health-based

50

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2013. Official EPA record →

Other · EPA contaminant 7500 began Mar 2013 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jan 2013 Resolved
Monitoring & reporting · Total coliform began Feb 2012 Resolved
Treatment technique · Bromate health-based began Jan 2012 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jan 2012 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2011 Resolved
Treatment technique · EPA contaminant 0200 health-based began Mar 2008 Resolved
Treatment technique · EPA contaminant 0200 health-based began Feb 2008 Resolved
Other · EPA contaminant 7500 began Nov 2003 Resolved
Other · EPA contaminant 7500 began Nov 2003 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2003 Resolved
Monitoring & reporting · EPA contaminant 0200 began Dec 1999 Resolved

Recent enforcement actions

  • State action · SIA Apr 2013
  • State action · SIF Mar 2013
  • State action · SOX Mar 2013
  • State action · SOX Mar 2013
  • State action · SFJ Feb 2013
  • State action · SIA Feb 2013
  • State action · SIE Feb 2013
  • State action · SOX Jun 2012

This profile is built from EPA public records for system IL1570100 — 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.