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Water system · PWSID MT0002800

SHELBY ADDITION WATER DISTRICT

MISSOULA, MT · ~145 people served

Check your exact address → MISSOULA overview
100
Excellent
PurityRadar safety score

PWSID

MT0002800

State

Montana

City

MISSOULA

Population served

145

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

23

Violations on record

0

Unaddressed

10

Health-based

78

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2018. Official EPA record →

Other · EPA contaminant 7000 began Jul 2018 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2014 Resolved
Monitoring & reporting · EPA contaminant 3014 began Sep 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2012 Resolved
Monitoring & reporting · EPA contaminant 3014 began Sep 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2008 Resolved
Other · EPA contaminant 7000 began Jul 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2005 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2005 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2004 Resolved

Recent enforcement actions

  • State action · SOX Jul 2018
  • State action · SIA Jul 2018
  • State action · SOX Sep 2014
  • State action · SIE Aug 2014
  • State action · SIA Aug 2014
  • State action · SIA Aug 2014
  • State action · SOX Oct 2012
  • State action · SOX Oct 2012

This profile is built from EPA public records for system MT0002800 — 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.