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Water system · PWSID CA3901074

TWIN OAKS MOBILE PARK

STOCKTON, CA · ~238 people served

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

PWSID

CA3901074

State

California

City

STOCKTON

Population served

238

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

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

13

Violations on record

0

Unaddressed

2

Health-based

20

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2015. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2014 Resolved
Other · EPA contaminant 7000 began Jul 2014 Resolved
Other · EPA contaminant 7000 began Jul 2013 Resolved
Other · EPA contaminant 7000 began Jul 2012 Resolved
Other · EPA contaminant 7000 began Jul 2011 Resolved
Other · EPA contaminant 7000 began Jul 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2008 Resolved
Other · EPA contaminant 7000 began Jul 2008 Resolved
Other · EPA contaminant 7000 began Jul 2006 Resolved
Other · EPA contaminant 7000 began Jul 2005 Resolved
Other · EPA contaminant 7000 began Jul 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2001 Resolved

Recent enforcement actions

  • State action · SOX Sep 2015
  • State action · SIA Nov 2014
  • State action · SIA Nov 2014
  • State action · SOX Nov 2014
  • State action · SOX Aug 2013
  • State action · SIE Jul 2013
  • State action · SOX Jul 2012
  • State action · SIA Jul 2012

This profile is built from EPA public records for system CA3901074 — 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.