SPHINX MOUNTAIN MB HM PK

GARDINER, MT · ~52 people served

Check your exact address → GARDINER overview

100

Excellent

PurityRadar safety score

PWSID

MT0003755

State

Montana

City

GARDINER

Population served

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2023. Official EPA record →

Monitoring & reporting · EPA contaminant 2046 began Jan 2020 Resolved

Monitoring & reporting · Lead & Copper Rule began Dec 2015 Resolved

Monitoring & reporting · EPA contaminant 3014 began Dec 2012 Resolved

Other · EPA contaminant 7000 began Jul 2011 Resolved

Monitoring & reporting · Gross alpha began Apr 2010 Resolved

Max contaminant level (MCL) · Arsenic health-based began Apr 2009 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jan 2009 Resolved

Monitoring & reporting · Arsenic began Oct 2008 Resolved

Monitoring & reporting · Arsenic began Jan 2008 Resolved

Max contaminant level (MCL) · Total coliform health-based began Apr 2006 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2004 Resolved

Recent enforcement actions

State action · SOX Feb 2023
State action · SOX Feb 2023
State action · SOX Feb 2023
State action · SOX Feb 2023
State action · SOX Feb 2023
State action · SOX Feb 2023
State action · SIE Jan 2023
State action · SIA Jan 2023

This profile is built from EPA public records for system MT0003755 — 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.