Shonto Preparatory Boarding School BIA

Shonto, AZ · ~664 people served

Check your exact address → Shonto overview

100

Excellent

PurityRadar safety score

PWSID

NN0433016

State

Arizona

City

Shonto

Population served

664

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

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Reporting · Lead & Copper Rule began Jan 2024 Resolved

Reporting · Lead & Copper Rule began Oct 2023 Resolved

Reporting · Lead & Copper Rule began Oct 2022 Resolved

Reporting · Lead & Copper Rule began May 2020 Resolved

Monitoring & reporting · EPA contaminant 3014 began Feb 2018 Resolved

Other · Lead & Copper Rule began Apr 2016 Resolved

Monitoring & reporting · Total coliform began Nov 2014 Resolved

Monitoring & reporting · EPA contaminant 0600 began Oct 2013 Resolved

Monitoring & reporting · Total coliform began Dec 2012 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2010 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2010 Resolved

Monitoring & reporting · Selenium began Jan 2008 Resolved

Recent enforcement actions

State action · SFJ Apr 2025
State action · SFJ Apr 2025
State action · SFJ Apr 2025
State action · SFJ Apr 2025
State action · SFJ Apr 2025
State action · SFJ Apr 2025
State action · SOX Oct 2024
State action · SOX Feb 2024

This profile is built from EPA public records for system NN0433016 — 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.