Home/ Directory/ MT/ SHELBY CITY OF

Water system · PWSID MT0000328

SHELBY CITY OF

SHELBY, MT · ~3,970 people served

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

PWSID

MT0000328

State

Montana

City

SHELBY

Population served

3,970

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

Latest detections from EPA’s UCMR5 monitoring (through Jul 2024). Levels in parts per trillion (ppt).

Lithium

11,000 ppt

limit —

No federal limit

Violations & enforcement

24

Violations on record

1

Unaddressed

6

Health-based

51

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2020. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Unaddressed
Monitoring & reporting · EPA contaminant 3014 began Jul 2020 Resolved
Monitoring & reporting · EPA contaminant 3014 began Oct 2019 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2017 Resolved
Monitoring & reporting · Total coliform began Jun 2015 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2014 Resolved
Other · EPA contaminant 7000 began Jul 2014 Resolved
Other · EPA contaminant 7000 began Jul 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2012 Resolved
Other · EPA contaminant 7000 began Jul 2011 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2004 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2004 Resolved

Recent enforcement actions

  • State action · SOX Aug 2020
  • State action · SIA Aug 2020
  • State action · SIE Aug 2020
  • State action · SIF Feb 2020
  • State action · SOX Dec 2019
  • State action · SIE Dec 2019
  • State action · SIA Dec 2019
  • State action · SOX Feb 2018

This profile is built from EPA public records for system MT0000328 — 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.