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Water system · PWSID CA0103040

NORRIS CANYON PROPERTY OWNERS ASSN

CASTRO VALLEY, CA · ~50 people served

Check your exact address → CASTRO VALLEY overview
85
Excellent
PurityRadar safety score

PWSID

CA0103040

State

California

City

CASTRO VALLEY

Population served

50

Primary source

Groundwater

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

55

Violations on record

2

Unaddressed

1

Health-based

7

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2018. Official EPA record →

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Monitoring & reporting · EPA contaminant 2976 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2981 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2983 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2982 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2984 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2985 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2987 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2977 began Jan 2014 Resolved

Recent enforcement actions

  • State action · SOX Feb 2018
  • State action · SFL Jan 2017
  • State action · SOX Jan 2017
  • State action · SFJ May 2005
  • State action · SFJ May 2005
  • State action · SOX Apr 2000
  • State action · SID Sep 1985

This profile is built from EPA public records for system CA0103040 — 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.