SUPERIOR TOWN OF

SUPERIOR, MT · ~1,100 people served

Check your exact address → SUPERIOR overview

100

Excellent

PurityRadar safety score

PWSID

MT0000339

State

Montana

City

SUPERIOR

Population served

1,100

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2017. Official EPA record →

Monitoring & reporting · EPA contaminant 0700 began Jun 2017 Resolved

Monitoring & reporting · Total coliform began Jun 1998 Resolved

Monitoring & reporting · Nitrate began Jan 1997 Resolved

Monitoring & reporting · EPA contaminant 2043 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2036 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2047 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2046 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2044 began Jan 1996 Resolved

Recent enforcement actions

State action · SOX Aug 2017
State action · SIF Jul 2017
State action · SIA Jul 2017
State action · SIE Jul 2017
State action · SOX May 2009
State action · SOX Apr 2009
State action · SOX May 2001
State action · SIA Sep 1986

This profile is built from EPA public records for system MT0000339 — 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.