COMMERCE-CITY, WATER DEPT.

SAN JOSE, CA · ~4,205 people served

Check your exact address → SAN JOSE overview

Fair

PurityRadar safety score

PWSID

CA1910050

State

California

City

SAN JOSE

Population served

4,205

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 Nov 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

9.3 ppt

limit 4 ppt

Above EPA limit · 2.3×

Lithium

36,400 ppt

limit —

No federal limit

PFHxA

14 ppt

limit —

No federal limit

PFPeA

13 ppt

limit —

No federal limit

PFBS

9.7 ppt

limit —

No federal limit

PFBA

5.8 ppt

limit —

No federal limit

PFHpA

5.1 ppt

limit —

No federal limit

Violations & enforcement

No violations are on record for this system in EPA’s SDWIS/ECHO data.

This profile is built from EPA public records for system CA1910050 — 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.