Rough Rock Demonstration School BIA

Chinle, AZ · ~200 people served

Check your exact address → Chinle overview

100

Excellent

PurityRadar safety score

PWSID

NN0435112

State

Arizona

City

Chinle

Population served

200

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

139

Violations on record

Unaddressed

Health-based

125

Enforcement actions

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

Reporting · Lead & Copper Rule began Apr 2025 Resolved

Reporting · Lead & Copper Rule began Mar 2025 Resolved

Reporting · Lead & Copper Rule began Oct 2023 Resolved

Reporting · Lead & Copper Rule began Oct 2022 Resolved

Monitoring · Lead & Copper Rule began Nov 2020 Resolved

Reporting · Lead & Copper Rule began May 2020 Resolved

Monitoring & reporting · EPA contaminant 3014 began Aug 2016 Resolved

Other · Lead & Copper Rule began Apr 2016 Resolved

Monitoring & reporting · EPA contaminant 0600 began Oct 2013 Resolved

Monitoring & reporting · Total coliform began Dec 2012 Resolved

Max contaminant level (MCL) · Total coliform health-based began Nov 2010 Resolved

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

Recent enforcement actions

State action · SOX May 2025
State action · SOX Apr 2025
State action · SOX Nov 2023
State action · SOX Nov 2022
State action · SOX Dec 2020
State action · SOX Jun 2020
State action · SOX Sep 2017
State action · SIC Sep 2017

This profile is built from EPA public records for system NN0435112 — 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.