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Water system · PWSID CA4000637

COUNTRY HILLS ESTATES

ARROYO GRANDE, CA · ~60 people served

Check your exact address → ARROYO GRANDE overview
100
Excellent
PurityRadar safety score

PWSID

CA4000637

State

California

City

ARROYO GRANDE

Population served

60

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

46

Violations on record

0

Unaddressed

42

Health-based

15

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2020. Official EPA record →

Max contaminant level (MCL) · Arsenic health-based began Apr 2019 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2019 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2019 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2018 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2018 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2018 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2018 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2016 Resolved

Recent enforcement actions

  • State action · SOX Dec 2020
  • State action · SOX Oct 2019
  • State action · SFL Mar 2019
  • State action · SFL Mar 2016
  • State action · SIE Mar 2009
  • State action · SIE Mar 2009
  • State action · SFL Jan 2009
  • State action · SOX Feb 2008

This profile is built from EPA public records for system CA4000637 — 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.