METROPOLITAN DWID - DIABLO VILLAGE

TUCSON, AZ · ~5,542 people served

Check your exact address → TUCSON overview

100

Excellent

PurityRadar safety score

PWSID

AZ0410357

State

Arizona

City

TUCSON

Population served

5,542

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

Latest detections from EPA’s UCMR5 monitoring (through Aug 2025). Levels in parts per trillion (ppt).

Lithium

69,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2024 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2024 Resolved

Monitoring & reporting · Arsenic began Jul 2023 Resolved

Reporting · Lead & Copper Rule began Jul 2023 Resolved

Monitoring & reporting · Arsenic began Apr 2023 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2023 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2023 Resolved

Reporting · Lead & Copper Rule began Jul 2022 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2021 Resolved

Monitoring & reporting · EPA contaminant 0999 began Apr 2021 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2016 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2016 Resolved

Recent enforcement actions

State action · SOX Jul 2025
State action · SIF Jun 2025
State action · SIA Nov 2024
State action · SIE Nov 2024
State action · SIF Jun 2024
State action · SIE Jun 2024
State action · SIE Jun 2024
State action · SIF Nov 2023

This profile is built from EPA public records for system AZ0410357 — 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.