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Water system · PWSID AZ0407101

TOLLESON CITY OF

SURPRISE, AZ · ~9,300 people served

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

PWSID

AZ0407101

State

Arizona

City

SURPRISE

Population served

9,300

Primary source

SWP

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 Dec 2023). Levels in parts per trillion (ppt).

Lithium

45,000 ppt

limit —

No federal limit

PFBA

6.5 ppt

limit —

No federal limit

PFBS

3.3 ppt

limit —

No federal limit

Violations & enforcement

83

Violations on record

1

Unaddressed

0

Health-based

39

Enforcement actions

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

Other · EPA contaminant 7000 began Oct 2025 Unaddressed
Monitoring & reporting · EPA contaminant 0200 began Jul 2025 Resolved
Monitoring & reporting · EPA contaminant 0200 began Jul 2022 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Mar 2018 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Mar 2018 Resolved
Monitoring & reporting · Total coliform began Sep 2013 Resolved
Other · EPA contaminant 7000 began Jul 2013 Resolved
Other · EPA contaminant 7000 began Oct 2011 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2010 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2009 Resolved
Monitoring & reporting · Total coliform began May 2008 Resolved
Monitoring & reporting · Total coliform began Mar 2008 Resolved

Recent enforcement actions

  • State action · SIE Nov 2025
  • State action · SIA Nov 2025
  • State action · SOX Sep 2025
  • State action · SIA Sep 2025
  • State action · SOX Apr 2023
  • State action · SOX Jul 2018
  • State action · SOX Nov 2013
  • State action · SIA Nov 2013

This profile is built from EPA public records for system AZ0407101 — 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.