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Water system · PWSID CA1910036

CALIFORNIA WATER SERVICE CO. - ELA

SAN JOSE, CA · ~152,474 people served

Check your exact address → SAN JOSE overview
67
Fair
PurityRadar safety score

PWSID

CA1910036

State

California

City

SAN JOSE

Population served

152,474

Primary source

SWP

Score history

▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 67

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).

PFOS

Perfluorooctanesulfonic acid

8.6 ppt

limit 4 ppt

Above EPA limit · 2.1×

Lithium

28,900 ppt

limit —

No federal limit

PFBA

7 ppt

limit —

No federal limit

PFBS

4.1 ppt

limit —

No federal limit

PFHxA

3.6 ppt

limit —

No federal limit

PFPeA

3.5 ppt

limit —

No federal limit

Violations & enforcement

4

Violations on record

0

Unaddressed

3

Health-based

11

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2001. Official EPA record →

Monitoring & reporting · Total coliform began Aug 2000 Resolved
Max contaminant level (MCL) · Nitrate health-based began Apr 1996 Resolved
Max contaminant level (MCL) · Nitrate health-based began May 1995 Resolved
Max contaminant level (MCL) · Nitrate health-based began May 1995 Resolved

Recent enforcement actions

  • State action · SOX Jan 2001
  • State action · SOX Jan 2001
  • State action · SOX Sep 2000
  • State action · SFL May 2000
  • EPA/federal action · EOX Mar 2000
  • State action · SOX Jan 1998
  • State action · SOX Jun 1996
  • State action · SIA Jun 1996

This profile is built from EPA public records for system CA1910036 — 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.