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Water system · PWSID MT0000231

GRASS RANGE TOWN OF

GRASS RANGE, MT · ~102 people served

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

PWSID

MT0000231

State

Montana

City

GRASS RANGE

Population served

102

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

65

Violations on record

0

Unaddressed

0

Health-based

64

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2024. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved
Other · EPA contaminant 7000 began Jul 2023 Resolved
Monitoring & reporting · Thallium began Jan 2023 Resolved
Other · EPA contaminant 7000 began Jul 2020 Resolved
Other · EPA contaminant 7000 began Jul 2016 Resolved
Other · EPA contaminant 7000 began Jul 2015 Resolved
Other · EPA contaminant 7000 began Jul 2014 Resolved
Other · EPA contaminant 7000 began Oct 2013 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2013 Resolved
Monitoring & reporting · EPA contaminant 2977 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2011 Resolved

Recent enforcement actions

  • State action · SOX Jun 2024
  • State action · SIF Apr 2024
  • State action · SOX Feb 2024
  • State action · SIE Jan 2024
  • State action · SIA Jan 2024
  • State action · SIE Nov 2023
  • State action · SIA Nov 2023
  • State action · SOX Jul 2023

This profile is built from EPA public records for system MT0000231 — 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.