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Water system · PWSID CA2710009

CWSC KING CITY

SAN JOSE, CA · ~16,334 people served

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

PWSID

CA2710009

State

California

City

SAN JOSE

Population served

16,334

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

Lithium

14,000 ppt

limit —

No federal limit

Violations & enforcement

1

Violations on record

0

Unaddressed

1

Health-based

4

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2008. Official EPA record →

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

Recent enforcement actions

  • State action · SOX Feb 2008
  • State action · SIA Oct 2005
  • EPA/federal action · EFJ May 1993
  • State action · SOX Oct 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 Aug 2020

2.38 · max 2.38 mg/l as N · 2

Arsenic

1 station · latest Aug 2020

1.6 · max 1.6 ug/l · 1

Copper

1 station · latest Aug 2020

0.63 · max 0.63 ug/l · 1

Fluoride

1 station · latest Aug 2020

0.21 · max 0.21 mg/l · 1

Lead

1 station · latest Aug 2020

0.065 · max 0.065 ug/l · 1

Uranium

1 station · latest Aug 2020

1.38 · max 1.38 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 CA2710009 — 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.