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Water system · PWSID CA4300638

SAN MARTIN FOOTHILLS WATER COMPANY

SAN MARTIN, CA · ~145 people served

Check your exact address → SAN MARTIN overview
100
Excellent
PurityRadar safety score

PWSID

CA4300638

State

California

City

SAN MARTIN

Population served

145

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

9

Violations on record

0

Unaddressed

4

Health-based

17

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2021. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2019 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2010 Resolved
Monitoring & reporting · Total coliform began Dec 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2006 Resolved
Monitoring & reporting · Total coliform began Jul 2000 Resolved
Monitoring & reporting · Total coliform began Dec 1999 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 1999 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 1996 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

  • State action · SOX Jul 2021
  • State action · SFL Dec 2019
  • State action · SOX Sep 2010
  • State action · SFL Sep 2010
  • State action · SFL Feb 2008
  • State action · SOX Jan 2008
  • State action · SOX Nov 2006
  • State action · SFL Nov 2006

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 Oct 2022

3.74 · max 3.74 mg/l as N · 2

Arsenic

1 station · latest Oct 2022

0.24 · max 0.24 ug/l · 1

Fluoride

1 station · latest Oct 2022

0.21 · max 0.21 mg/l · 1

Manganese

1 station · latest Oct 2022

1.45 · max 1.45 ug/l · 1

Uranium

1 station · latest Oct 2022

0.547 · max 0.547 ug/l · 1

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 CA4300638 — 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.