GW OCOTILLO WATER - THUNDERHEAD

MARICOPA, AZ · ~174 people served

Check your exact address → MARICOPA overview

100

Excellent

PurityRadar safety score

PWSID

AZ0410179

State

Arizona

City

MARICOPA

Population served

174

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2013. Official EPA record →

Monitoring & reporting · Total coliform began Feb 2013 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2007 Resolved

Other · EPA contaminant 7000 began Jul 2006 Resolved

Other · EPA contaminant 7000 began Jul 2005 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2004 Resolved

Monitoring & reporting · Nitrate began Jan 2004 Resolved

Other · EPA contaminant 7000 began Jul 2003 Resolved

Other · EPA contaminant 7000 began Jul 2002 Resolved

Monitoring & reporting · EPA contaminant 1075 began Apr 2002 Resolved

Monitoring & reporting · EPA contaminant 1075 began Jan 2002 Resolved

Monitoring & reporting · EPA contaminant 1075 began Oct 2001 Resolved

Monitoring & reporting · EPA contaminant 2983 began Jan 2001 Resolved

Recent enforcement actions

State action · SIA Mar 2013
State action · SOX Mar 2013
State action · SOX Jul 2012
State action · SOX Dec 2006
State action · SOX Jul 2006
State action · SOX Jul 2005
State action · SOX Apr 2005
State action · SOX Jan 2004

This profile is built from EPA public records for system AZ0410179 — 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.