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Water system · PWSID MT0000413

AYERS HUTTERITE COLONY

GRASS RANGE, MT · ~58 people served

Check your exact address → GRASS RANGE overview
100
Excellent
PurityRadar safety score

PWSID

MT0000413

State

Montana

City

GRASS RANGE

Population served

58

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

14

Violations on record

0

Unaddressed

1

Health-based

39

Enforcement actions

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

Other · EPA contaminant 7000 began Jul 2020 Resolved
Monitoring & reporting · Thallium began Jan 2020 Resolved
Other · EPA contaminant 7000 began Jul 2018 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2015 Resolved
Other · EPA contaminant 7000 began Jul 2015 Resolved
Other · EPA contaminant 7000 began Oct 2013 Resolved
Monitoring & reporting · Total coliform began Feb 2012 Resolved
Treatment technique · EPA contaminant 0700 health-based began Oct 2010 Resolved
Other · EPA contaminant 7000 began Oct 2010 Resolved
Monitoring & reporting · Total coliform began Oct 2007 Resolved
Monitoring & reporting · Thallium began Jan 2000 Resolved
Monitoring & reporting · Nitrate began Jan 1998 Resolved

Recent enforcement actions

  • State action · SOX Feb 2021
  • State action · SIA Jan 2021
  • State action · SIE Jan 2021
  • State action · SOX Aug 2020
  • State action · SIA Jul 2020
  • State action · SOX Aug 2018
  • State action · SIA Jul 2018
  • State action · SIE Oct 2015

This profile is built from EPA public records for system MT0000413 — 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.