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Water system · PWSID NN0403003

Kayenta NTUA

Ft Defiance, AZ · ~3,844 people served

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

PWSID

NN0403003

State

Arizona

City

Ft Defiance

Population served

3,844

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 Sep 2023). Levels in parts per trillion (ppt).

Lithium

11,300 ppt

limit —

No federal limit

6:2 FTS

5.1 ppt

limit —

No federal limit

Violations & enforcement

101

Violations on record

1

Unaddressed

0

Health-based

254

Enforcement actions

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

Other · Lead & Copper Rule began Apr 2016 Unaddressed
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2020 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2020 Resolved
Monitoring & reporting · EPA contaminant 2037 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2036 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2005 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2033 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2015 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2020 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2031 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2034 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2010 began Jul 2017 Resolved

Recent enforcement actions

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

This profile is built from EPA public records for system NN0403003 — 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.