END-O-VALLEY MUTUAL WATER COMPANY

SANTA ROSA, CA · ~129 people served

Check your exact address → SANTA ROSA overview

100

Excellent

PurityRadar safety score

PWSID

CA4900547

State

California

City

SANTA ROSA

Population served

129

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 Mar 2024. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jun 2022 Resolved

Monitoring & reporting · Total coliform began Sep 2014 Resolved

Monitoring & reporting · Nitrate began Jan 2006 Resolved

Max contaminant level (MCL) · Total coliform health-based began Oct 1998 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 1997 Resolved

Monitoring & reporting · Total coliform began Mar 1995 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

State action · SOX Mar 2024
State action · SFL Dec 2022
State action · SFL Nov 2014
State action · SOX Oct 2014
State action · SOX Jun 2007
State action · SFL Jun 2007
EPA/federal action · EOX Dec 2003
State action · SOX Feb 1999

This profile is built from EPA public records for system CA4900547 — 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.