YELLOWSTONE HOLIDAY WTR AND SEW DISTRICT

WEST YELLOWSTONE, MT · ~85 people served

Check your exact address → WEST YELLOWSTONE overview

100

Excellent

PurityRadar safety score

PWSID

MT0001326

State

Montana

City

WEST YELLOWSTONE

Population served

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 2016. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2016 Resolved

Monitoring & reporting · Total coliform began Apr 2012 Resolved

Monitoring & reporting · Total coliform began May 2007 Resolved

Monitoring & reporting · Thallium began Jan 2005 Resolved

Monitoring & reporting · EPA contaminant 2036 began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 2037 began Jan 1999 Resolved

Monitoring & reporting · Total coliform began Jun 1997 Resolved

Monitoring & reporting · EPA contaminant 2326 began Jan 1996 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1994 Resolved

Monitoring & reporting · Total coliform began Oct 1993 Resolved

Monitoring & reporting · Total coliform began Sep 1992 Resolved

Recent enforcement actions

State action · SIE Oct 2016
State action · SOX Oct 2016
State action · SIA Oct 2016
State action · SIE May 2012
State action · SIA May 2012
State action · SOX Apr 2012
State action · SOX May 2009
State action · SOX May 2009

This profile is built from EPA public records for system MT0001326 — 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.