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Water system · PWSID AZ0407523

DESERT OASIS

SURPRISE, AZ · ~23,963 people served

Check your exact address → SURPRISE overview
100
Excellent
PurityRadar safety score

PWSID

AZ0407523

State

Arizona

City

SURPRISE

Population served

23,963

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 Jun 2025). Levels in parts per trillion (ppt).

Lithium

44,000 ppt

limit —

No federal limit

Violations & enforcement

40

Violations on record

0

Unaddressed

0

Health-based

36

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2024. Official EPA record →

Monitoring & reporting · Arsenic began Jul 2020 Resolved
Monitoring & reporting · Arsenic began Apr 2020 Resolved
Monitoring & reporting · Arsenic began Jan 2020 Resolved
Monitoring & reporting · Arsenic began Oct 2019 Resolved
Monitoring & reporting · Arsenic began Oct 2019 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2019 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2017 Resolved
Monitoring & reporting · Total coliform began Feb 2015 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2014 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2014 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2012 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2010 Resolved

Recent enforcement actions

  • State action · SIA Feb 2024
  • State action · SIA Feb 2024
  • State action · SOX Feb 2024
  • State action · SIA Feb 2021
  • State action · SIA Feb 2021
  • State action · SIA Feb 2021
  • State action · SOX Nov 2020
  • State action · SIA Jan 2019

This profile is built from EPA public records for system AZ0407523 — 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.