MESA DUNES MOBILE HOME ESTATES

ARROYO GRANDE, CA · ~600 people served

Check your exact address → ARROYO GRANDE overview

100

Excellent

PurityRadar safety score

PWSID

CA4000650

State

California

City

ARROYO GRANDE

Population served

600

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 2021. Official EPA record →

Monitoring · Lead & Copper Rule began Feb 2021 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2019 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2019 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2018 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2018 Resolved

Monitoring & reporting · Total coliform began Apr 2014 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

State action · SFL Mar 2021
State action · SOX Mar 2021
State action · SFL Jan 2020
State action · SOX Jan 2020
State action · SFL Feb 2019
State action · SOX Jan 2019
State action · SFL Jun 2014
State action · SOX May 2014

This profile is built from EPA public records for system CA4000650 — 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.