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Water system · PWSID MT0001857

SUNSET WEST RSID

MISSOULA, MT · ~105 people served

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

PWSID

MT0001857

State

Montana

City

MISSOULA

Population served

105

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

21

Violations on record

0

Unaddressed

12

Health-based

84

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2014. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Aug 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2008 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2002 Resolved

Recent enforcement actions

  • State action · SOX Sep 2014
  • State action · SOX Sep 2014
  • State action · SIE Aug 2014
  • State action · SIA Aug 2014
  • State action · SIF Aug 2014
  • State action · SIA Aug 2014
  • State action · SIA Jul 2014
  • State action · SIA Jul 2014

This profile is built from EPA public records for system MT0001857 — 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.