CASTLEWOOD DOMESTIC WATER SYSTEM

PLEASANTON, CA · ~524 people served

Check your exact address → PLEASANTON overview

Excellent

PurityRadar safety score

PWSID

CA0105008

State

California

City

PLEASANTON

Population served

524

Primary source

GWP

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 85 Jun 18, 2026 · score 85

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 Jan 2026. Official EPA record →

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Addressed

Reporting · EPA contaminant 5200 began Oct 2024 Addressed

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

Recent enforcement actions

EPA/federal action · EFL Jan 2026
State action · SOX Apr 2000
State action · SIA Oct 1993

This profile is built from EPA public records for system CA0105008 — 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.