DIAMOND VALLEY WATER DISTRICT

HUMBOLDT, AZ · ~2,000 people served

Check your exact address → HUMBOLDT overview

100

Excellent

PurityRadar safety score

PWSID

AZ0413017

State

Arizona

City

HUMBOLDT

Population served

2,000

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 May 2024. Official EPA record →

Reporting · EPA contaminant 5200 began Jul 2025 Unaddressed

Monitoring & reporting · EPA contaminant 0999 began Apr 2023 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2021 Resolved

Monitoring · Lead & Copper Rule began Nov 2017 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2017 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2016 Resolved

Monitoring & reporting · Total coliform began Dec 2015 Resolved

Monitoring & reporting · Total coliform began Oct 2014 Resolved

Monitoring & reporting · Total coliform began Feb 2014 Resolved

Other · EPA contaminant 7000 began Oct 2013 Resolved

Other · EPA contaminant 7000 began Jul 2013 Resolved

Recent enforcement actions

State action · SOX May 2024
State action · SIA Aug 2023
State action · SOX May 2023
State action · SIA Apr 2023
State action · SOX May 2021
State action · SIA May 2021
State action · SIA Dec 2017
State action · SOX Dec 2017

This profile is built from EPA public records for system AZ0413017 — 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.