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Water system · PWSID ID5420030

HOLLISTER CITY OF

HOLLISTER, ID · ~220 people served

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

PWSID

ID5420030

State

Idaho

City

HOLLISTER

Population served

220

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

33

Violations on record

1

Unaddressed

2

Health-based

43

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2015. Official EPA record →

Monitoring & reporting · Arsenic began Jan 2024 Unaddressed
Monitoring & reporting · Nitrate began Apr 2015 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2014 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2013 Resolved
Monitoring & reporting · Gross alpha began Oct 2013 Resolved
Monitoring & reporting · Gross alpha began Jul 2013 Resolved
Monitoring & reporting · Gross alpha began Apr 2013 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2012 Resolved
Monitoring & reporting · Gross alpha began Oct 2012 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2012 Resolved
Monitoring & reporting · Gross alpha began Jul 2012 Resolved
Monitoring & reporting · Gross alpha began Jul 2012 Resolved

Recent enforcement actions

  • State action · SOX Nov 2015
  • State action · SIE Aug 2015
  • State action · SIA Aug 2015
  • State action · SOX May 2015
  • State action · SIF May 2015
  • State action · SOX Feb 2015
  • State action · SIE Nov 2014
  • State action · SIA Nov 2014

This profile is built from EPA public records for system ID5420030 — 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.