Cottonwood-Tselani NTUA

Ft Defiance, AZ · ~1,334 people served

Check your exact address → Ft Defiance overview

100

Excellent

PurityRadar safety score

PWSID

NN0403021

State

Arizona

City

Ft Defiance

Population served

1,334

Primary source

GWP

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

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Monitoring & reporting · EPA contaminant 0600 began Oct 2013 Unaddressed

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2020 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2020 Resolved

Other · Lead & Copper Rule began Apr 2016 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jul 2013 Resolved

Max contaminant level (MCL) · Arsenic health-based began Apr 2013 Resolved

Monitoring & reporting · Total coliform began Dec 2012 Resolved

Monitoring & reporting · Total coliform began Nov 2012 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2011 Resolved

Max contaminant level (MCL) · Gross alpha health-based began Oct 2010 Resolved

Monitoring & reporting · Nitrite began Jan 2010 Resolved

Monitoring & reporting · EPA contaminant 2955 began Jan 2005 Resolved

Recent enforcement actions

State action · SOX Jan 2025
State action · SFJ Aug 2024
State action · SOX Jul 2021
State action · SOX Jul 2021
State action · SFG Mar 2021
State action · SFJ Mar 2021
State action · SFJ Mar 2021
State action · SFG Mar 2021

This profile is built from EPA public records for system NN0403021 — 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.