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Water system · PWSID 093534024

Dzilthnaodithhle Boarding School - BIE

Window Rock, AZ · ~400 people served

Check your exact address → Window Rock overview
100
Excellent
PurityRadar safety score

PWSID

093534024

State

Arizona

City

Window Rock

Population served

400

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

33

Violations on record

2

Unaddressed

1

Health-based

36

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Jul 2025 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Jan 2025 Unaddressed
Other · EPA contaminant 7000 began Jul 2023 Resolved
Monitoring & reporting · EPA contaminant 3014 began May 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2020 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2019 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2019 Resolved
Monitoring & reporting · Nitrate began Jan 2017 Resolved
Monitoring & reporting · EPA contaminant 3014 began Feb 2016 Resolved
Max contaminant level (MCL) · Total coliform health-based began Feb 2016 Resolved
Other · EPA contaminant 7000 began Jul 2006 Resolved
Other · EPA contaminant 7000 began Jul 2005 Resolved

Recent enforcement actions

  • EPA/federal action · EIA Sep 2025
  • EPA/federal action · EIA Sep 2025
  • EPA/federal action · EOX Dec 2023
  • EPA/federal action · EOX Dec 2023
  • EPA/federal action · EOX Sep 2020
  • EPA/federal action · EOX Sep 2020
  • EPA/federal action · EOX Sep 2020
  • EPA/federal action · EOX Apr 2018

This profile is built from EPA public records for system 093534024 — 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.