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Water system · PWSID CA1910134

CALIFORNIA WATER SERVICE CO. - HERM/REDO

SAN JOSE, CA · ~96,853 people served

Check your exact address → SAN JOSE overview
100
Excellent
PurityRadar safety score

PWSID

CA1910134

State

California

City

SAN JOSE

Population served

96,853

Primary source

SWP

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2025). Levels in parts per trillion (ppt).

Lithium

26,100 ppt

limit —

No federal limit

Violations & enforcement

3

Violations on record

0

Unaddressed

3

Health-based

7

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 1995. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Aug 1995 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 1995 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1995 Resolved

Recent enforcement actions

  • State action · SFJ Oct 1995
  • State action · SOX Oct 1995
  • State action · SOX Sep 1995
  • State action · SOX Aug 1995
  • State action · SFJ Aug 1995
  • EPA/federal action · EOX Dec 1993
  • EPA/federal action · EOX Dec 1992

This profile is built from EPA public records for system CA1910134 — 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.