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Water system · PWSID MT0004226

PIONEER WATER SERVICE

BILLINGS, MT · ~900 people served

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

PWSID

MT0004226

State

Montana

City

BILLINGS

Population served

900

Primary source

SWP

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

17

Violations on record

0

Unaddressed

0

Health-based

39

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2021 Resolved
Other · EPA contaminant 7000 began Jul 2021 Resolved
Other · EPA contaminant 7000 began Jul 2020 Resolved
Other · EPA contaminant 7000 began Jul 2019 Resolved
Monitoring · Lead & Copper Rule began Jun 2018 Resolved
Monitoring · Lead & Copper Rule began Jul 2017 Resolved
Other · EPA contaminant 7000 began Oct 2012 Resolved
Other · EPA contaminant 7000 began Jul 2012 Resolved
Monitoring & reporting · Total coliform began Sep 2010 Resolved
Monitoring & reporting · Total coliform began Oct 2008 Resolved
Other · EPA contaminant 7000 began Jul 2006 Resolved

Recent enforcement actions

  • State action · SOX Sep 2025
  • State action · SIE Feb 2025
  • State action · SIA Feb 2025
  • State action · SOX Jun 2022
  • State action · SOX Jan 2022
  • State action · SIA Jan 2022
  • State action · SIA Jul 2021
  • State action · SOX Sep 2020

This profile is built from EPA public records for system MT0004226 — 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.