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Water system · PWSID OK1011401

FREDERICK

FREDERICK, OK · ~3,940 people served

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

PWSID

OK1011401

State

Oklahoma

City

FREDERICK

Population served

3,940

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 2023). Levels in parts per trillion (ppt).

PFHxS

Perfluorohexanesulfonic acid

3 ppt

limit 10 ppt

Below EPA limit

PFBA

12 ppt

limit —

No federal limit

Violations & enforcement

113

Violations on record

0

Unaddressed

96

Health-based

253

Enforcement actions

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

Max contaminant level (MCL) · EPA contaminant 1094 health-based began Jul 2025 Resolved
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Resolved
Reporting · EPA contaminant 5200 began Oct 2024 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2018 Resolved
Max contaminant level (MCL) · EPA contaminant 1009 health-based began Jan 2018 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2018 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2017 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2017 Resolved
Max contaminant level (MCL) · EPA contaminant 1009 health-based began Feb 2016 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2015 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2015 Resolved
Monitoring & reporting · EPA contaminant 1009 began Jul 2015 Resolved

Recent enforcement actions

  • State action · SIF Nov 2025
  • State action · SOX Nov 2025
  • State action · SIE Oct 2025
  • State action · SFL Oct 2025
  • State action · SIA Jul 2025
  • State action · SIA Jul 2025
  • State action · SOX Oct 2024
  • State action · SOX Oct 2024

This profile is built from EPA public records for system OK1011401 — 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.