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Water system · PWSID CA1110003

CAL-WATER SERVICE CO.-WILLOWS

SAN JOSE, CA · ~7,240 people served

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

PWSID

CA1110003

State

California

City

SAN JOSE

Population served

7,240

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

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

Lithium

16,000 ppt

limit —

No federal limit

Violations & enforcement

2

Violations on record

0

Unaddressed

2

Health-based

2

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 1997. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Oct 1996 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1992 Resolved

Recent enforcement actions

  • State action · SOX Jun 1997
  • State action · SIA Oct 1996

This profile is built from EPA public records for system CA1110003 — 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.