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Water system · PWSID NN0400814

Coppermine NTUA

Ft Defiance, AZ · ~342 people served

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

PWSID

NN0400814

State

Arizona

City

Ft Defiance

Population served

342

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

14

Violations on record

0

Unaddressed

1

Health-based

37

Enforcement actions

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

Monitoring & reporting · Arsenic began Jan 2022 Resolved
Monitoring & reporting · Arsenic began Jan 2019 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2017 Resolved
Other · EPA contaminant 7500 began Jan 2017 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 2383 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2931 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2946 began Jan 2008 Resolved
Monitoring & reporting · Uranium began Jan 2005 Resolved

Recent enforcement actions

  • State action · SFJ Apr 2025
  • State action · SFJ Apr 2025
  • State action · SOX Feb 2023
  • State action · SOX May 2022
  • State action · SOX May 2022
  • State action · SFG Mar 2022
  • State action · SFJ Mar 2022
  • State action · SFJ Jul 2019

This profile is built from EPA public records for system NN0400814 — 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.