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Water system · PWSID CA4310027

SANTA CLARA VALLEY WATER DISTRICT

SAN JOSE, CA

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

PWSID

CA4310027

State

California

City

SAN JOSE

Population served

—

Primary source

Surface water

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

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

2

Violations on record

0

Unaddressed

2

Health-based

9

Enforcement actions

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

Treatment technique · EPA contaminant 0200 health-based began Sep 1996 Resolved
Treatment technique · EPA contaminant 0200 health-based began Feb 1996 Resolved

Recent enforcement actions

  • State action · SOX Mar 1997
  • State action · SIA Mar 1997
  • State action · SFJ Jan 1997
  • State action · SIA Sep 1996
  • State action · SOX Sep 1996
  • State action · SOX Sep 1996
  • State action · SIA Sep 1996
  • State action · SOX Jul 1996

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

8 stations · latest Mar 2023

0.681 · max 4.8 mg/l as N · 72

Fluoride

15 stations · latest Mar 2023

0.15 · max 0.4 mg/l · 52

Manganese

12 stations · latest Mar 2023

30.7 · max 1,140 ug/l · 37

Arsenic

10 stations · latest Mar 2023

0.67 · max 4 ug/l · 35

Copper

4 stations · latest Mar 2023

2.9 · max 50.7 ug/l · 28

Lead

5 stations · latest Mar 2023

0.5 · max 21.9 ug/l · 27

Uranium

11 stations · latest Mar 2023

0.091 · max 6.58 ug/l · 23

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CA4310027 — 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.