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Water system · PWSID AZ0411136

EPCOR - SAN TAN ANTHEM

SAN TAN VALLEY, AZ · ~10,362 people served

Check your exact address → SAN TAN VALLEY overview
67
Fair
PurityRadar safety score

PWSID

AZ0411136

State

Arizona

City

SAN TAN VALLEY

Population served

10,362

Primary source

Groundwater

Score history

▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 67

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

PFOA

Perfluorooctanoic acid

19 ppt

limit 4 ppt

Above EPA limit · 4.8×

Lithium

110,000 ppt

limit —

No federal limit

PFPeA

39 ppt

limit —

No federal limit

PFBS

24 ppt

limit —

No federal limit

PFHxA

21 ppt

limit —

No federal limit

PFBA

5.4 ppt

limit —

No federal limit

PFHpA

4.6 ppt

limit —

No federal limit

Violations & enforcement

28

Violations on record

0

Unaddressed

0

Health-based

48

Enforcement actions

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

Monitoring & reporting · EPA contaminant 0999 began Oct 2024 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2024 Resolved
Monitoring & reporting · Nitrate began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2022 Resolved
Other · EPA contaminant 7500 began Mar 2022 Resolved
Monitoring · Lead & Copper Rule began Jan 2021 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began May 2019 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began May 2019 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jan 2019 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began May 2018 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began May 2018 Resolved
Monitoring & reporting · Lead & Copper Rule began Nov 2017 Resolved

Recent enforcement actions

  • State action · SOX Jan 2025
  • State action · SIA Jan 2025
  • State action · SOX Oct 2024
  • State action · SIF Sep 2024
  • State action · SIA Aug 2024
  • State action · SOX Aug 2024
  • State action · SIA Aug 2023
  • State action · SIE Aug 2023

This profile is built from EPA public records for system AZ0411136 — 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.