Home/ Directory/ AZ/ Whitehorse Lake NTUA

Water system · PWSID NN3500239

Whitehorse Lake NTUA

Ft Defiance, AZ · ~277 people served

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

PWSID

NN3500239

State

Arizona

City

Ft Defiance

Population served

277

Primary source

SWP

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

22

Violations on record

2

Unaddressed

2

Health-based

59

Enforcement actions

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

Other · Lead & Copper Rule began Apr 2016 Unaddressed
Monitoring & reporting · EPA contaminant 0600 began Oct 2013 Unaddressed
Monitoring & reporting · EPA contaminant 2063 began Oct 2014 Resolved
Monitoring & reporting · EPA contaminant 2032 began Oct 2014 Resolved
Monitoring & reporting · EPA contaminant 2033 began Oct 2014 Resolved
Monitoring & reporting · EPA contaminant 2034 began Oct 2014 Resolved
Monitoring & reporting · Nitrite began Jul 2013 Resolved
Monitoring & reporting · Nitrate began Jul 2013 Resolved
Monitoring & reporting · Total coliform began Dec 2012 Resolved
Monitoring & reporting · Total coliform began Nov 2012 Resolved
Max contaminant level (MCL) · Beryllium health-based began Oct 2010 Resolved
Monitoring & reporting · Nitrite began Jan 2010 Resolved

Recent enforcement actions

  • State action · SFJ Apr 2025
  • State action · SFJ Apr 2025
  • State action · SFJ Aug 2024
  • State action · SOX Apr 2022
  • State action · SFJ Mar 2021
  • State action · SFG Mar 2021
  • State action · SFG Aug 2017
  • State action · SFJ Aug 2017

This profile is built from EPA public records for system NN3500239 — 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.