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Water system · PWSID NN3503028

Toadlena NTUA

Ft Defiance, AZ · ~903 people served

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

PWSID

NN3503028

State

Arizona

City

Ft Defiance

Population served

903

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

Latest detections from EPA’s UCMR5 monitoring (through Nov 2024). Levels in parts per trillion (ppt).

Lithium

31,600 ppt

limit —

No federal limit

Violations & enforcement

95

Violations on record

2

Unaddressed

5

Health-based

138

Enforcement actions

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

Other · EPA contaminant 7500 began Apr 2025 Unaddressed
Other · EPA contaminant 7500 began Oct 2024 Unaddressed
Other · EPA contaminant 7500 began Jul 2024 Resolved
Other · EPA contaminant 7500 began Apr 2024 Resolved
Other · EPA contaminant 7500 began Apr 2022 Resolved
Monitoring & reporting · Arsenic began Jan 2022 Resolved
Other · EPA contaminant 7500 began Apr 2021 Resolved
Other · EPA contaminant 7500 began Apr 2020 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2020 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2020 Resolved
Monitoring & reporting · Arsenic began Jul 2019 Resolved
Monitoring & reporting · Arsenic began Apr 2019 Resolved

Recent enforcement actions

  • State action · SFJ Apr 2025
  • State action · SFJ Apr 2025
  • State action · SOX Aug 2024
  • State action · SOX Apr 2024
  • State action · SOX Feb 2023
  • State action · SOX May 2022
  • State action · SOX Apr 2022
  • State action · SOX Jul 2021

This profile is built from EPA public records for system NN3503028 — 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.