HUMBOLDT WATER SYSTEM

MAYER, AZ · ~825 people served

Check your exact address → MAYER overview

100

Excellent

PurityRadar safety score

PWSID

AZ0413052

State

Arizona

City

MAYER

Population served

825

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

108

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2017. Official EPA record →

Other · EPA contaminant 7000 began Jul 2017 Resolved

Max contaminant level (MCL) · Arsenic health-based began Apr 2015 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jan 2015 Resolved

Max contaminant level (MCL) · Arsenic health-based began Oct 2014 Resolved

Other · EPA contaminant 7000 began Oct 2014 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jul 2014 Resolved

Max contaminant level (MCL) · Arsenic health-based began Apr 2014 Resolved

Monitoring & reporting · Nitrate began Apr 2014 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jan 2014 Resolved

Other · EPA contaminant 7000 began Oct 2013 Resolved

Max contaminant level (MCL) · Arsenic health-based began Oct 2013 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jul 2013 Resolved

Recent enforcement actions

State action · SOX Sep 2017
State action · SOX Nov 2015
State action · SOX Oct 2015
State action · SOX Sep 2015
State action · SIA Apr 2015
State action · SIA Feb 2015
State action · SIA Feb 2015
State action · SIA Aug 2014

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Copper

1 station · latest Jun 2024

0.0027 · max 0.0034 mg/L · 2

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system AZ0413052 — 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.