LAGUNA MOUNTAIN MUTUAL WATER CO.

MT LAGUNA, CA · ~100 people served

Check your exact address → MT LAGUNA overview

100

Excellent

PurityRadar safety score

PWSID

CA3700422

State

California

City

MT LAGUNA

Population served

100

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 May 2024. Official EPA record →

Monitoring · Lead & Copper Rule began Jun 2022 Resolved

Monitoring · Lead & Copper Rule began Feb 2019 Resolved

Monitoring & reporting · Nitrate began Jan 2016 Resolved

Monitoring & reporting · Total coliform began Dec 2007 Resolved

Other · EPA contaminant 7000 began Jul 2005 Resolved

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

Recent enforcement actions

State action · SFL May 2024
State action · SOX Oct 2022
State action · SFL Nov 2019
State action · SOX Nov 2019
State action · SOX Aug 2016
State action · SFL Jan 2016
State action · SFL Jul 2008
State action · SOX Jan 2008

This profile is built from EPA public records for system CA3700422 — 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.