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Water system · PWSID OK1020910

OSU WATER PLANT

STILLWATER, OK · ~13,000 people served

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

PWSID

OK1020910

State

Oklahoma

City

STILLWATER

Population served

13,000

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

PFBA

7.5 ppt

limit —

No federal limit

Violations & enforcement

32

Violations on record

0

Unaddressed

22

Health-based

60

Enforcement actions

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

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2025 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jun 2025 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2025 Resolved
Treatment technique · EPA contaminant 0200 health-based began Mar 2023 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Mar 2020 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Dec 2019 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2019 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2019 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2019 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2019 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2019 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2019 Resolved

Recent enforcement actions

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

This profile is built from EPA public records for system OK1020910 — 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.