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Water system · PWSID MT0001782

HILLSIDE COLONY INC

SWEET GRASS, MT · ~100 people served

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

PWSID

MT0001782

State

Montana

City

SWEET GRASS

Population served

100

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

12

Violations on record

0

Unaddressed

1

Health-based

29

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2015. Official EPA record →

Other · EPA contaminant 7000 began Jul 2015 Resolved
Monitoring & reporting · Total coliform began Jun 2015 Resolved
Monitoring & reporting · Thallium began Jul 2012 Resolved
Monitoring & reporting · Thallium began Apr 2012 Resolved
Monitoring & reporting · Thallium began Oct 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2005 Resolved
Monitoring & reporting · Total coliform began Aug 2003 Resolved
Monitoring & reporting · Total coliform began Aug 1999 Resolved
Monitoring & reporting · Total coliform began Aug 1997 Resolved
Monitoring & reporting · Total coliform began Dec 1996 Resolved
Monitoring & reporting · Total coliform began Aug 1992 Resolved
Monitoring & reporting · Total coliform began Jul 1992 Resolved

Recent enforcement actions

  • State action · SOX Jul 2015
  • State action · SOX Jul 2015
  • State action · SIA Jul 2015
  • State action · SIE Jul 2015
  • State action · SIA Jul 2015
  • State action · SOX Nov 2012
  • State action · SIA Oct 2012
  • State action · SIE Oct 2012

This profile is built from EPA public records for system MT0001782 — 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.