SAN MARTIN COUNTY WATER DISTRICT

SAN MARTIN, CA · ~627 people served

Check your exact address → SAN MARTIN overview

100

Excellent

PurityRadar safety score

PWSID

CA4300542

State

California

City

SAN MARTIN

Population served

627

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 Oct 2020. Official EPA record →

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

Monitoring & reporting · Lead & Copper Rule began Jul 1999 Resolved

Monitoring & reporting · EPA contaminant 2051 began Jan 1999 Resolved

Monitoring & reporting · Nitrate began Jan 1998 Resolved

Monitoring & reporting · Nitrite began Jan 1996 Resolved

Monitoring & reporting · Nitrate began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2990 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2051 began Jan 1996 Resolved

Max contaminant level (MCL) · Nitrate health-based began Jul 1993 Resolved

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

Recent enforcement actions

State action · SOX Oct 2020
State action · SFL Dec 2019
EPA/federal action · EOX Dec 2003
State action · SOX May 2001
State action · SIF May 2001
State action · SIE May 2001
State action · SFL May 2001
State action · SIA Aug 2000

This profile is built from EPA public records for system CA4300542 — 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.