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Water system · PWSID MT0000308

POLSON CITY OF

POLSON, MT · ~5,300 people served

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

PWSID

MT0000308

State

Montana

City

POLSON

Population served

5,300

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

93

Violations on record

0

Unaddressed

1

Health-based

32

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2026. Official EPA record →

Other · EPA contaminant 7000 began Oct 2025 Resolved
Monitoring & reporting · Thallium began Jan 2024 Resolved
Other · EPA contaminant 7000 began Jul 2008 Resolved
Monitoring & reporting · Total coliform began Sep 2005 Resolved
Monitoring & reporting · EPA contaminant 2968 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2005 Resolved
Monitoring & reporting · Thallium began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2005 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2005 Resolved
Monitoring & reporting · Thallium began Jan 2005 Resolved

Recent enforcement actions

  • State action · SIA Jan 2026
  • State action · SIE Jan 2026
  • State action · SIA Oct 2025
  • State action · SOX Oct 2025
  • State action · SIE Jan 2025
  • State action · SOX Jan 2025
  • State action · SIA Jan 2025
  • State action · SOX Jan 2009

This profile is built from EPA public records for system MT0000308 — 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.