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Water system · PWSID CA4900575

LOCH HAVEN MUTUAL WATER COMPANY

SANTA ROSA, CA · ~26 people served

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

PWSID

CA4900575

State

California

City

SANTA ROSA

Population served

26

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

56

Violations on record

0

Unaddressed

44

Health-based

41

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2019. Official EPA record →

Max contaminant level (MCL) · Arsenic health-based began Oct 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2016 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2016 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2016 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2016 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2015 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2015 Resolved

Recent enforcement actions

  • State action · SOX Feb 2019
  • State action · SFL Nov 2015
  • State action · SOX Oct 2015
  • State action · SFL Jun 2015
  • State action · SOX Jul 2011
  • State action · SFL Mar 2011
  • State action · SFL Dec 2010
  • State action · SOX Nov 2010

This profile is built from EPA public records for system CA4900575 — 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.