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Water system · PWSID CA4900905

MARK WEST MEADOWS MUTUAL WATER

SANTA ROSA, CA · ~20 people served

Check your exact address → SANTA ROSA overview
85
Excellent
PurityRadar safety score

PWSID

CA4900905

State

California

City

SANTA ROSA

Population served

20

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 85 Jun 18, 2026 · score 85

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

5

Violations on record

2

Unaddressed

1

Health-based

5

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2005. Official EPA record →

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Monitoring & reporting · Total coliform began Aug 2005 Resolved
Monitoring & reporting · Total coliform began Oct 2003 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

  • State action · SFL Sep 2005
  • State action · SOX Sep 2005
  • EPA/federal action · EOX Dec 2003
  • State action · SFL Dec 2003
  • State action · SOX Nov 2003

This profile is built from EPA public records for system CA4900905 — 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.