WILSHIRE HEIGHTS MUTUAL WATER COMPANY

SANTA ROSA, CA · ~70 people served

Check your exact address → SANTA ROSA overview

100

Excellent

PurityRadar safety score

PWSID

CA4900573

State

California

City

SANTA ROSA

Population served

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2012. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began May 2012 Resolved

Max contaminant level (MCL) · Total coliform health-based began Nov 2011 Resolved

Max contaminant level (MCL) · Total coliform health-based began Dec 2010 Resolved

Monitoring & reporting · Total coliform began Mar 2000 Resolved

Max contaminant level (MCL) · Total coliform health-based began May 1996 Resolved

Monitoring & reporting · Total coliform began Feb 1996 Resolved

Recent enforcement actions

State action · SOX Jun 2012
State action · SFL Jun 2012
State action · SFL Jan 2012
State action · SOX Dec 2011
State action · SFL Feb 2011
State action · SOX Jan 2011
State action · SOX Apr 2000
State action · SFL Apr 2000

This profile is built from EPA public records for system CA4900573 — 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.