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Water system · PWSID MT0004250

OAK RIDGE ESTATES

BILLINGS, MT · ~200 people served

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

PWSID

MT0004250

State

Montana

City

BILLINGS

Population served

200

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

83

Violations on record

0

Unaddressed

1

Health-based

56

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2023. Official EPA record →

Other · EPA contaminant 7000 began Jul 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2014 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2010 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2996 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2968 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2991 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2955 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2992 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2008 Resolved

Recent enforcement actions

  • State action · SIA Jul 2023
  • State action · SOX Jul 2023
  • State action · SOX Feb 2014
  • State action · SIA Jan 2014
  • State action · SOX Sep 2013
  • State action · SIE Oct 2012
  • State action · SIA Oct 2012
  • EPA/federal action · EOX Nov 2010

This profile is built from EPA public records for system MT0004250 — 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.