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Water system · PWSID CA4110024

CITY OF EAST PALO ALTO

EAST PALO ALTO, CA · ~29,519 people served

Check your exact address → EAST PALO ALTO overview
100
Excellent
PurityRadar safety score

PWSID

CA4110024

State

California

City

EAST PALO ALTO

Population served

29,519

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

11

Violations on record

0

Unaddressed

7

Health-based

18

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2017. Official EPA record →

Treatment technique · EPA contaminant 0200 health-based began Mar 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2014 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2005 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2005 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 1999 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1998 Resolved
Other · Total coliform began Sep 1996 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1996 Resolved
Monitoring & reporting · Total coliform began Jun 1996 Resolved
Monitoring & reporting · Lead & Copper Rule began Jun 1993 Resolved

Recent enforcement actions

  • State action · SOX Mar 2017
  • State action · SFL Apr 2015
  • State action · SOX Jul 2014
  • State action · SFL Jul 2014
  • State action · SOX Jun 2014
  • State action · SFL Jun 2014
  • State action · SOX Jul 2006
  • State action · SIA Mar 2006

This profile is built from EPA public records for system CA4110024 — 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.