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Water system · PWSID MT0000580

TWO BUTTES WATER USERS ASSN

FORT SHAW, MT · ~525 people served

Check your exact address → FORT SHAW overview
100
Excellent
PurityRadar safety score

PWSID

MT0000580

State

Montana

City

FORT SHAW

Population served

525

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

40

Violations on record

0

Unaddressed

2

Health-based

111

Enforcement actions

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

Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2019 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2019 Resolved
Other · EPA contaminant 7000 began Oct 2017 Resolved
Other · EPA contaminant 7000 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 3014 began Mar 2017 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2016 Resolved
Other · Lead & Copper Rule began Apr 2016 Resolved
Other · EPA contaminant 7000 began Oct 2015 Resolved
Other · EPA contaminant 7000 began Jul 2015 Resolved
Other · EPA contaminant 7000 began Oct 2014 Resolved
Other · EPA contaminant 7000 began Jul 2014 Resolved

Recent enforcement actions

  • State action · SOX Aug 2021
  • State action · SIA Oct 2020
  • State action · SIE Oct 2020
  • State action · SOX Feb 2018
  • State action · SOX Feb 2018
  • State action · SOX Feb 2018
  • State action · SOX Jan 2018
  • State action · SOX Jan 2018

This profile is built from EPA public records for system MT0000580 — 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.