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Water system · PWSID AZ0402004

ARIZONA WATER CO - SIERRA VISTA

PHOENIX, AZ · ~9,175 people served

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

PWSID

AZ0402004

State

Arizona

City

PHOENIX

Population served

9,175

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 Nov 2024). Levels in parts per trillion (ppt).

Lithium

9,900 ppt

limit —

No federal limit

PFHxA

4.4 ppt

limit —

No federal limit

PFPeA

3 ppt

limit —

No federal limit

Violations & enforcement

78

Violations on record

0

Unaddressed

2

Health-based

23

Enforcement actions

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

Reporting · EPA contaminant 5200 began Oct 2024 Resolved
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2015 Resolved
Other · EPA contaminant 7000 began Jul 2010 Resolved
Monitoring & reporting · Total coliform began Nov 2009 Resolved
Other · EPA contaminant 7000 began Jul 2009 Resolved
Monitoring & reporting · Total coliform began Nov 2008 Resolved
Monitoring & reporting · Total coliform began Oct 2007 Resolved
Monitoring & reporting · Total coliform began Sep 2007 Resolved
Other · EPA contaminant 7000 began Jul 2007 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2007 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2006 Resolved

Recent enforcement actions

  • State action · SIF Dec 2024
  • State action · SIE Nov 2024
  • State action · SIA Nov 2024
  • State action · SIE Nov 2024
  • State action · SIA Nov 2024
  • State action · SOX Nov 2024
  • State action · SOX Jan 2016
  • State action · SOX Jul 2010

This profile is built from EPA public records for system AZ0402004 — 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.