White Rock-Lake Valley NTUA

Ft Defiance, AZ · ~492 people served

Check your exact address → Ft Defiance overview

100

Excellent

PurityRadar safety score

PWSID

NN3500269

State

Arizona

City

Ft Defiance

Population served

492

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

215

Enforcement actions

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

Other · Lead & Copper Rule began Apr 2016 Unaddressed

Monitoring & reporting · Arsenic began Jan 2020 Resolved

Monitoring & reporting · Total coliform began Dec 2012 Resolved

Monitoring & reporting · Total coliform began Nov 2012 Resolved

Max contaminant level (MCL) · Total coliform health-based began Apr 2012 Resolved

Monitoring & reporting · Total coliform began Oct 2011 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 2011 Resolved

Monitoring & reporting · Barium began Jan 2011 Resolved

Monitoring & reporting · Fluoride began Jan 2011 Resolved

Monitoring & reporting · Arsenic began Jan 2011 Resolved

Monitoring & reporting · Beryllium began Jan 2011 Resolved

Monitoring & reporting · Chromium (total) began Jan 2011 Resolved

Recent enforcement actions

State action · SFJ Apr 2025
State action · SFJ Apr 2025
State action · SFJ Aug 2024
State action · SOX Jun 2022
State action · SFJ Mar 2022
State action · SFG Mar 2022
State action · SOX Dec 2021
State action · SFJ Mar 2021

This profile is built from EPA public records for system NN3500269 — 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.