FAIRPLAY MHP

LOS ALTOS, CA · ~215 people served

Check your exact address → LOS ALTOS overview

100

Excellent

PurityRadar safety score

PWSID

CO0147030

State

California

City

LOS ALTOS

Population served

215

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 Feb 2022. Official EPA record →

Monitoring & reporting · EPA contaminant 0999 began Jan 2022 Resolved

Reporting · Lead & Copper Rule began Jan 2022 Resolved

Monitoring · Lead & Copper Rule began Mar 2021 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2021 Resolved

Other · EPA contaminant 7000 began Jul 2011 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2007 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2005 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2004 Resolved

Other · EPA contaminant 7000 began Jul 2004 Resolved

Monitoring & reporting · Total coliform began Apr 1998 Resolved

Monitoring & reporting · Total coliform began Mar 1998 Resolved

Monitoring & reporting · Total coliform began Aug 1994 Resolved

Recent enforcement actions

State action · SOX Feb 2022
State action · SIA Feb 2022
State action · SIE Feb 2022
State action · SIA Feb 2022
State action · SIE Feb 2022
State action · SOX Nov 2021
State action · SIE May 2021
State action · SIA May 2021

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Dec 2020

19.5 · max 26.3 mg/L · 12

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CO0147030 — 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.