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Water system · PWSID MT0003556

NORTH SHORE ESTATES HOA

THOMPSON FALLS, MT · ~65 people served

Check your exact address → THOMPSON FALLS overview
100
Excellent
PurityRadar safety score

PWSID

MT0003556

State

Montana

City

THOMPSON FALLS

Population served

65

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

30

Violations on record

0

Unaddressed

12

Health-based

79

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2021. Official EPA record →

Other · EPA contaminant 7000 began Jul 2021 Resolved
Other · EPA contaminant 7000 began Jul 2018 Resolved
Other · EPA contaminant 7000 began Jul 2017 Resolved
Other · EPA contaminant 7000 began Jul 2014 Resolved
Monitoring & reporting · Total coliform began Apr 2012 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2011 Resolved
Monitoring & reporting · Total coliform began Aug 2011 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2011 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2011 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2011 Resolved

Recent enforcement actions

  • State action · SOX Aug 2021
  • State action · SIA Jul 2021
  • State action · SOX Jul 2018
  • State action · SIA Jul 2018
  • State action · SOX Jul 2017
  • State action · SIA Jul 2017
  • State action · SOX Aug 2014
  • State action · SOX Jul 2014

This profile is built from EPA public records for system MT0003556 — 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.