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Water system · PWSID CA4900723

SHAMROCK MOBILE HOME PARK

SANTA ROSA, CA · ~188 people served

Check your exact address → SANTA ROSA overview
100
Excellent
PurityRadar safety score

PWSID

CA4900723

State

California

City

SANTA ROSA

Population served

188

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

29

Violations on record

0

Unaddressed

17

Health-based

12

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2018. Official EPA record →

Max contaminant level (MCL) · Arsenic health-based began Oct 2012 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2012 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2012 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2012 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2011 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2011 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2011 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2011 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2010 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2010 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2010 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2010 Resolved

Recent enforcement actions

  • State action · SOX Mar 2018
  • State action · SOX Oct 2013
  • State action · SFL Mar 2013
  • State action · SOX Dec 2012
  • State action · SFL May 2009
  • State action · SFL Dec 2008
  • State action · SFL Dec 2007
  • State action · SOX Dec 2007

This profile is built from EPA public records for system CA4900723 — 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.