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Water system · PWSID CA4310014

CITY OF SUNNYVALE

SUNNYVALE, CA · ~157,566 people served

Check your exact address → SUNNYVALE overview
100
Excellent
PurityRadar safety score

PWSID

CA4310014

State

California

City

SUNNYVALE

Population served

157,566

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

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

68

Violations on record

0

Unaddressed

3

Health-based

21

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2024. Official EPA record →

Treatment technique · EPA contaminant 0200 health-based began Mar 2015 Resolved
Monitoring & reporting · Beryllium began Jan 2015 Resolved
Monitoring & reporting · Cadmium began Jan 2015 Resolved
Monitoring & reporting · Fluoride began Jan 2015 Resolved
Monitoring & reporting · Arsenic began Jan 2015 Resolved
Monitoring & reporting · Barium began Jan 2015 Resolved
Monitoring & reporting · Nitrite began Jan 2015 Resolved
Monitoring & reporting · Chromium (total) began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 1075 began Jan 2015 Resolved
Monitoring & reporting · Selenium began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 1036 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 1085 began Jan 2015 Resolved

Recent enforcement actions

  • State action · SOX Feb 2024
  • State action · SFJ Feb 2024
  • State action · SOX Feb 2018
  • State action · SOX Nov 2016
  • State action · SFL Apr 2015
  • EPA/federal action · EOX Mar 2000
  • State action · SFL Apr 1997
  • State action · SOX Apr 1997

This profile is built from EPA public records for system CA4310014 — 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.