MOUNTAIN MEADOWS MWC

MAMMOTH LAKES, CA · ~505 people served

Check your exact address → MAMMOTH LAKES overview

100

Excellent

PurityRadar safety score

PWSID

CA2600620

State

California

City

MAMMOTH LAKES

Population served

505

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 Aug 2014. Official EPA record →

Monitoring & reporting · Total coliform began Jul 2010 Resolved

Monitoring & reporting · Total coliform began May 2002 Resolved

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

Recent enforcement actions

State action · SIF Aug 2014
State action · SOX Aug 2010
State action · SIF Jul 2010
EPA/federal action · EOX Sep 2005
State action · SOX Jun 2002

This profile is built from EPA public records for system CA2600620 — 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.