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Water system · PWSID AZ0411087

MARICOPA MOUNTAIN DWID 1

MARICOPA, AZ · ~450 people served

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

PWSID

AZ0411087

State

Arizona

City

MARICOPA

Population served

450

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

179

Violations on record

0

Unaddressed

41

Health-based

162

Enforcement actions

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

Other · EPA contaminant 7500 began Sep 2025 Resolved
Other · EPA contaminant 7500 began Apr 2025 Resolved
Other · EPA contaminant 7500 began Jul 2022 Resolved
Other · EPA contaminant 7000 began Oct 2021 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2021 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2021 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jan 2021 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2020 Resolved
Other · EPA contaminant 7500 began Apr 2019 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2018 Resolved
Monitoring & reporting · Arsenic began Jan 2017 Resolved

Recent enforcement actions

  • State action · SIA Nov 2025
  • State action · SOX Nov 2025
  • State action · SIA Nov 2025
  • State action · SIF Nov 2025
  • State action · SIA May 2025
  • State action · SOX May 2025
  • State action · SIE Oct 2024
  • State action · SIA Aug 2022

This profile is built from EPA public records for system AZ0411087 — 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.