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Water system · PWSID OK2001411

NOBLE UTILITIES AUTHORITY

NOBLE, OK · ~5,750 people served

Check your exact address → NOBLE overview
97
Excellent
PurityRadar safety score

PWSID

OK2001411

State

Oklahoma

City

NOBLE

Population served

5,750

Primary source

Groundwater

Score history

▼ 3 points — the score moved from 100 to 97 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 97

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

PFHxS

Perfluorohexanesulfonic acid

7.1 ppt

limit 10 ppt

Near EPA limit

Lithium

24,400 ppt

limit —

No federal limit

Violations & enforcement

12

Violations on record

0

Unaddressed

7

Health-based

60

Enforcement actions

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

Reporting · EPA contaminant 5200 began Oct 2024 Resolved
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Resolved
Monitoring & reporting · EPA contaminant 1094 began Jan 2024 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2008 Resolved
Monitoring & reporting · EPA contaminant 2046 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2010 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2020 began Jan 2005 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 1996 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 1993 Resolved

Recent enforcement actions

  • State action · SOX Jul 2025
  • State action · SOX Jul 2025
  • State action · SIA Jul 2025
  • State action · SIA Jul 2025
  • State action · SOX Jul 2025
  • State action · SIF Jun 2025
  • State action · SIA Mar 2025
  • State action · SIE Mar 2025

This profile is built from EPA public records for system OK2001411 — 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.