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Water system · PWSID NN3500278

Tsa Yah Toh NTUA

Ft Defiance, AZ · ~865 people served

Check your exact address → Ft Defiance overview
100
Excellent
PurityRadar safety score

PWSID

NN3500278

State

Arizona

City

Ft Defiance

Population served

865

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

65

Violations on record

1

Unaddressed

0

Health-based

46

Enforcement actions

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

Other · Lead & Copper Rule began Apr 2016 Unaddressed
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2020 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2020 Resolved
Monitoring & reporting · EPA contaminant 0600 began Oct 2013 Resolved
Monitoring & reporting · Total coliform began Dec 2012 Resolved
Monitoring & reporting · Total coliform began Nov 2012 Resolved
Monitoring & reporting · Nitrite began Jan 2010 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2977 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2005 Resolved

Recent enforcement actions

  • State action · SFJ Apr 2025
  • State action · SFJ Apr 2025
  • State action · SOX Feb 2025
  • State action · SFJ Aug 2024
  • State action · SOX Aug 2021
  • State action · SOX Aug 2021
  • State action · SFJ Mar 2021
  • State action · SFG Mar 2021

This profile is built from EPA public records for system NN3500278 — 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.