MOUNTAIN VIEW MOBILE HOME PARK

SAN MATEO, CA · ~75 people served

Check your exact address → SAN MATEO overview

100

Excellent

PurityRadar safety score

PWSID

NM3550001

State

California

City

SAN MATEO

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

122

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2025. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jan 1993 Unaddressed

Monitoring & reporting · Lead & Copper Rule began Jul 2025 Resolved

Other · EPA contaminant 7000 began Oct 2024 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Resolved

Other · EPA contaminant 7500 began Dec 2020 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2019 Resolved

Other · EPA contaminant 7500 began Oct 2017 Resolved

Treatment technique · Lead & Copper Rule health-based began Aug 2017 Resolved

Other · EPA contaminant 7500 began Aug 2017 Resolved

Other · EPA contaminant 7000 began Jul 2017 Resolved

Other · EPA contaminant 7500 began Jun 2017 Resolved

Recent enforcement actions

State action · SOX Dec 2025
State action · SIE Aug 2025
State action · SIA Aug 2025
State action · SOX Jun 2025
State action · SIE Feb 2025
State action · SIA Feb 2025
State action · SOX Oct 2024
State action · SIA Oct 2024

This profile is built from EPA public records for system NM3550001 — 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.