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Water system · PWSID CA3500550

SAN JUSTO MUTUAL WATER COMPANY

HOLLISTER, CA · ~160 people served

Check your exact address → HOLLISTER overview
85
Excellent
PurityRadar safety score

PWSID

CA3500550

State

California

City

HOLLISTER

Population served

160

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 85 Jun 18, 2026 · score 85

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

32

Violations on record

2

Unaddressed

11

Health-based

53

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2023. Official EPA record →

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Other · EPA contaminant 7000 began Jul 2021 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2020 Resolved
Monitoring & reporting · Total coliform began Sep 2007 Resolved
Other · EPA contaminant 7500 began Sep 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2007 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2007 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jan 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2005 Resolved
Other · Total coliform began Mar 2005 Resolved

Recent enforcement actions

  • State action · SOX Nov 2023
  • State action · SOX Sep 2023
  • State action · SFL Mar 2023
  • State action · SFL Nov 2022
  • State action · SFL Jan 2022
  • State action · SOX Dec 2021
  • State action · SOX Dec 2007
  • State action · SFL Oct 2007

This profile is built from EPA public records for system CA3500550 — 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.