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Water system · PWSID IL1550250

MARK

MARK, IL · ~555 people served

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

PWSID

IL1550250

State

Illinois

City

MARK

Population served

555

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

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

28

Violations on record

0

Unaddressed

19

Health-based

114

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2024. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2022 Resolved
Other · EPA contaminant 7500 began Jul 2022 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2022 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2004 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2004 Resolved
Other · EPA contaminant 7500 began Apr 2004 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2004 Resolved
Other · EPA contaminant 7500 began Jan 2004 Resolved
Other · EPA contaminant 7500 began Jan 2004 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2004 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2003 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2003 Resolved

Recent enforcement actions

  • State action · SOX Mar 2024
  • State action · SIF Jun 2023
  • State action · SIE Oct 2022
  • State action · SIA Oct 2022
  • State action · SOX Sep 2022
  • State action · SFK Aug 2022
  • State action · SFL Aug 2022
  • State action · SIA Jul 2022

This profile is built from EPA public records for system IL1550250 — 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.