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Water system · PWSID CA1510003

CWS - BAKERSFIELD

SAN JOSE, CA · ~267,881 people served

Check your exact address → SAN JOSE overview
59
Fair
PurityRadar safety score

PWSID

CA1510003

State

California

City

SAN JOSE

Population served

267,881

Primary source

Surface water

Score history

▼ 41 points — the score moved from 100 to 59 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 59

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

PFOA

Perfluorooctanoic acid

9.1 ppt

limit 4 ppt

Above EPA limit · 2.3×

PFOS

Perfluorooctanesulfonic acid

4 ppt

limit 4 ppt

Near EPA limit

PFHxS

Perfluorohexanesulfonic acid

5.1 ppt

limit 10 ppt

Near EPA limit

Lithium

11,900 ppt

limit —

No federal limit

PFHxA

4.6 ppt

limit —

No federal limit

PFHpA

3.5 ppt

limit —

No federal limit

PFBS

3.1 ppt

limit —

No federal limit

PFPeA

3.1 ppt

limit —

No federal limit

Violations & enforcement

4

Violations on record

0

Unaddressed

3

Health-based

12

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2011. Official EPA record →

Monitoring & reporting · Nitrate began Jan 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1994 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1992 Resolved

Recent enforcement actions

  • State action · SOX May 2011
  • State action · SIA May 2011
  • State action · SOX Dec 2002
  • State action · SFL Dec 2002
  • EPA/federal action · EOX Mar 2000
  • State action · SOX Jun 1994
  • State action · SFJ Jun 1994
  • EPA/federal action · EOX Dec 1993

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

Copper

1 station · latest Feb 2021

0.695 · max 4.6 ug/L · 11

Arsenic

2 stations · latest Feb 2021

3.85 · max 5.3 ug/L · 8

Lead

1 station · latest Feb 2021

0.057 · max 0.19 ug/L · 8

Nitrate

2 stations · latest Feb 2021

0.2 · max 0.38 mg/L · 7

Atrazine

1 station · latest Mar 2022

4.96 · max 4.96 ng/l · 2

Fluoride

2 stations · latest Mar 2022

0.16 · max 0.16 mg/l · 2

Uranium

2 stations · latest Mar 2022

7.71 · max 14 ug/l · 2

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 CA1510003 — 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.