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Water system · PWSID MT0001771

NORTH HARLEM COLONY

HARLEM, MT · ~42 people served

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

PWSID

MT0001771

State

Montana

City

HARLEM

Population served

42

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

39

Violations on record

0

Unaddressed

0

Health-based

35

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2016. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2015 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2013 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2010 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2009 Resolved
Other · EPA contaminant 7000 began Jul 2008 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2004 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2002 Resolved
Monitoring & reporting · EPA contaminant 2955 began Jan 2002 Resolved
Monitoring & reporting · Chlorite began Jan 2002 Resolved
Monitoring & reporting · EPA contaminant 2041 began Jan 2002 Resolved
Monitoring & reporting · EPA contaminant 2110 began Jan 2002 Resolved
Monitoring & reporting · EPA contaminant 2326 began Jan 2002 Resolved

Recent enforcement actions

  • State action · SOX Jul 2016
  • State action · SIA Oct 2015
  • State action · SIE Oct 2015
  • State action · SOX Jan 2013
  • State action · SIA Jan 2013
  • State action · SOX Jul 2012
  • State action · SOX Sep 2011
  • State action · SIE Oct 2010

This profile is built from EPA public records for system MT0001771 — 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.