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Water system · PWSID CA4310012

CITY OF SANTA CLARA

SANTA CLARA, CA · ~130,746 people served

Check your exact address → SANTA CLARA overview
100
Excellent
PurityRadar safety score

PWSID

CA4310012

State

California

City

SANTA CLARA

Population served

130,746

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 Mar 2025). Levels in parts per trillion (ppt).

Lithium

11,000 ppt

limit —

No federal limit

Violations & enforcement

2

Violations on record

0

Unaddressed

2

Health-based

6

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2000. Official EPA record →

Treatment technique · EPA contaminant 0200 health-based began Mar 1995 Resolved
Treatment technique · EPA contaminant 0200 health-based began Mar 1992 Resolved

Recent enforcement actions

  • State action · SOX Jul 2000
  • State action · SFL Apr 1997
  • State action · SOX Apr 1995
  • State action · SIA Apr 1995
  • State action · SO8 Apr 1993
  • State action · SFL Apr 1992

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

1 station · latest Apr 2022

4.03 · max 4.03 mg/l as N · 2

Arsenic

1 station · latest Apr 2022

0.45 · max 0.45 ug/l · 1

Fluoride

1 station · latest Apr 2022

0.12 · max 0.12 mg/l · 1

Uranium

1 station · latest Apr 2022

1.32 · max 1.32 ug/l · 1

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 CA4310012 — 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.