Home/ Directory/ AZ/ MESA CITY OF

Water system · PWSID AZ0407095

MESA CITY OF

MESA, AZ · ~466,000 people served

Check your exact address → MESA overview
94
Excellent
PurityRadar safety score

PWSID

AZ0407095

State

Arizona

City

MESA

Population served

466,000

Primary source

Surface water

Score history

▼ 6 points — the score moved from 100 to 94 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 94

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

PFHxS

Perfluorohexanesulfonic acid

8.6 ppt

limit 10 ppt

Near EPA limit

Lithium

107,000 ppt

limit —

No federal limit

PFBS

12 ppt

limit —

No federal limit

PFHxA

3.2 ppt

limit —

No federal limit

Violations & enforcement

1,555

Violations on record

0

Unaddressed

1

Health-based

792

Enforcement actions

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

Monitoring · Lead & Copper Rule began Aug 2025 Resolved
Monitoring & reporting · EPA contaminant 1011 began Mar 2025 Resolved
Monitoring & reporting · EPA contaminant 1011 began Feb 2025 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2968 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2955 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2023 Resolved

Recent enforcement actions

  • State action · SOX Oct 2025
  • State action · SIA Oct 2025
  • State action · SOX Jun 2025
  • State action · SIE May 2025
  • State action · SIA May 2025
  • State action · SIE May 2025
  • State action · SIA May 2025
  • State action · SOX Jul 2024

This profile is built from EPA public records for system AZ0407095 — 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.