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Water system · PWSID NN0400209

White Mesa NTUA

Fort Defiance, AZ · ~496 people served

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

PWSID

NN0400209

State

Arizona

City

Fort Defiance

Population served

496

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

85

Violations on record

1

Unaddressed

0

Health-based

96

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Jan 2024 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Jan 2021 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2020 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2017 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2015 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2015 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2015 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2015 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2015 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2015 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2015 Resolved

Recent enforcement actions

  • State action · SFJ Apr 2025
  • State action · SOX Jun 2022
  • State action · SFG Mar 2022
  • State action · SFJ Mar 2022
  • State action · SOX Jul 2021
  • State action · SOX Jul 2021
  • State action · SFJ Mar 2021
  • State action · SFJ Mar 2021

This profile is built from EPA public records for system NN0400209 — 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.