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Water system · PWSID MT0000271

LEWISTOWN CITY OF

LEWISTOWN, MT · ~5,923 people served

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

PWSID

MT0000271

State

Montana

City

LEWISTOWN

Population served

5,923

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

156

Violations on record

0

Unaddressed

19

Health-based

118

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2025. Official EPA record →

Other · EPA contaminant 7000 began Jul 2025 Resolved
Monitoring & reporting · EPA contaminant 3014 began Nov 2017 Resolved
Other · EPA contaminant 7000 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 3014 began Nov 2016 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 2016 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2015 Resolved
Other · EPA contaminant 7000 began Jul 2015 Resolved
Monitoring & reporting · Fluoride began Jan 2014 Resolved
Monitoring & reporting · Barium began Jan 2014 Resolved
Monitoring & reporting · Arsenic began Jan 2014 Resolved
Monitoring & reporting · Cadmium began Jan 2014 Resolved
Monitoring & reporting · Chromium (total) began Jan 2014 Resolved

Recent enforcement actions

  • State action · SIA Jul 2025
  • State action · SOX Jul 2025
  • State action · SOX Jan 2018
  • State action · SIE Dec 2017
  • State action · SIA Dec 2017
  • State action · SOX Aug 2017
  • State action · SIA Jul 2017
  • State action · SOX Mar 2017

This profile is built from EPA public records for system MT0000271 — 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.