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Water system · PWSID OK3004014

WISTER

WISTER, OK · ~1,002 people served

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

PWSID

OK3004014

State

Oklahoma

City

WISTER

Population served

1,002

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

24

Violations on record

0

Unaddressed

1

Health-based

45

Enforcement actions

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

Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2025 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2023 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jun 2009 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jun 2009 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began May 2008 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began May 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2005 Resolved
Monitoring & reporting · Total coliform began Oct 2005 Resolved
Monitoring & reporting · Total coliform began Mar 2001 Resolved
Monitoring & reporting · Total coliform began Feb 2001 Resolved
Monitoring & reporting · Total coliform began Jan 2001 Resolved

Recent enforcement actions

  • State action · SOX Nov 2025
  • State action · SIA Nov 2025
  • State action · SIF May 2025
  • State action · SOX Dec 2024
  • State action · SIA Aug 2024
  • State action · SIE Aug 2024
  • State action · SIF Jun 2024
  • State action · SOX Dec 2023

This profile is built from EPA public records for system OK3004014 — 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.