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Water system · PWSID MT0003694

CARPENTER LAKE HOA

EUREKA, MT · ~65 people served

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

PWSID

MT0003694

State

Montana

City

EUREKA

Population served

65

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

21

Violations on record

0

Unaddressed

3

Health-based

41

Enforcement actions

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

Monitoring · Lead & Copper Rule began Nov 2025 Resolved
Treatment technique · Lead & Copper Rule health-based began Sep 2023 Resolved
Other · EPA contaminant 7000 began Jul 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2011 Resolved
Monitoring & reporting · EPA contaminant 1094 began Jan 2011 Resolved
Other · EPA contaminant 7000 began Jul 2008 Resolved
Monitoring & reporting · Total coliform began Aug 2007 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 1998 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1997 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1996 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 1996 Resolved

Recent enforcement actions

  • State action · SOX Dec 2025
  • State action · SIA Dec 2025
  • State action · SIE Dec 2025
  • State action · SOX Dec 2023
  • State action · SIE Dec 2023
  • State action · SIA Dec 2023
  • State action · SOX Jul 2015
  • State action · SIA Jul 2015

This profile is built from EPA public records for system MT0003694 — 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.