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Water system · PWSID NN0400342

Dilkon-Indian Wells-Greasewood-White Cone NTUA

Fort Defiance, AZ · ~4,986 people served

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

PWSID

NN0400342

State

Arizona

City

Fort Defiance

Population served

4,986

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 Jun 2025). Levels in parts per trillion (ppt).

Lithium

78,900 ppt

limit —

No federal limit

Violations & enforcement

100

Violations on record

1

Unaddressed

46

Health-based

190

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2024. Official EPA record →

Other · Lead & Copper Rule began Apr 2016 Unaddressed
Monitoring · Lead & Copper Rule began Jul 2022 Resolved
Other · EPA contaminant 7500 began Jul 2022 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2021 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2021 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2021 Resolved
Other · EPA contaminant 7500 began Apr 2021 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2021 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2020 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2020 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2020 Resolved
Other · EPA contaminant 7500 began Apr 2020 Resolved

Recent enforcement actions

  • State action · SFJ Aug 2024
  • State action · SOX May 2024
  • State action · SOX May 2024
  • State action · SOX May 2024
  • State action · SOX May 2024
  • State action · SOX May 2024
  • State action · SOX May 2024
  • State action · SOX May 2024

This profile is built from EPA public records for system NN0400342 — 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.