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Water system · PWSID CA3500904

HOLLISTER RANCH ESTATES

HOLLISTER, CA · ~150 people served

Check your exact address → HOLLISTER overview
100
Excellent
PurityRadar safety score

PWSID

CA3500904

State

California

City

HOLLISTER

Population served

150

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

22

Violations on record

0

Unaddressed

11

Health-based

15

Enforcement actions

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

Monitoring & reporting · Nitrate began Apr 2023 Resolved
Monitoring · Lead & Copper Rule began Nov 2019 Resolved
Max contaminant level (MCL) · Combined radium-226/228 health-based began Jul 2017 Resolved
Monitoring · Lead & Copper Rule began May 2017 Resolved
Monitoring & reporting · EPA contaminant 3014 began Apr 2017 Resolved
Max contaminant level (MCL) · Combined radium-226/228 health-based began Apr 2017 Resolved
Max contaminant level (MCL) · Combined radium-226/228 health-based began Jan 2017 Resolved
Max contaminant level (MCL) · Combined radium-226/228 health-based began Oct 2016 Resolved
Max contaminant level (MCL) · Combined radium-226/228 health-based began Jul 2016 Resolved
Max contaminant level (MCL) · Combined radium-226/228 health-based began Apr 2016 Resolved
Max contaminant level (MCL) · Combined radium-226/228 health-based began Jan 2016 Resolved
Max contaminant level (MCL) · Combined radium-226/228 health-based began Oct 2015 Resolved

Recent enforcement actions

  • State action · SOX Oct 2023
  • State action · SFL Jul 2023
  • State action · SFL Jan 2020
  • State action · SOX Jan 2020
  • State action · SOX Dec 2017
  • State action · SFL Aug 2017
  • State action · SOX Jun 2017
  • State action · SFL Jun 2016

This profile is built from EPA public records for system CA3500904 — 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.