Mittenrock NTUA

Ft Defiance, AZ · ~352 people served

Check your exact address → Ft Defiance overview

100

Excellent

PurityRadar safety score

PWSID

NN3503057

State

Arizona

City

Ft Defiance

Population served

352

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

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Max contaminant level (MCL) · Arsenic health-based began Jan 2017 Resolved

Other · EPA contaminant 7500 began Jan 2017 Resolved

Max contaminant level (MCL) · Arsenic health-based began Oct 2016 Resolved

Other · EPA contaminant 7500 began Oct 2015 Resolved

Max contaminant level (MCL) · Arsenic health-based began Oct 2015 Resolved

Monitoring & reporting · Arsenic began Jul 2014 Resolved

Monitoring & reporting · Arsenic began Jan 2014 Resolved

Monitoring & reporting · EPA contaminant 0600 began Oct 2013 Resolved

Max contaminant level (MCL) · Arsenic health-based began Apr 2013 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jan 2013 Resolved

Monitoring & reporting · Total coliform began Dec 2012 Resolved

Monitoring & reporting · Total coliform began Nov 2012 Resolved

Recent enforcement actions

State action · SOX Oct 2025
State action · SFJ Apr 2025
State action · SFJ Apr 2025
State action · SFJ Aug 2017
State action · SFG Aug 2017
State action · SOX May 2017
State action · SFJ Feb 2017
State action · SOX Feb 2017

This profile is built from EPA public records for system NN3503057 — 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.