NORTHWOODS WATER SYSTEM COOP INC

COLUMBIA FALLS, MT · ~135 people served

Check your exact address → COLUMBIA FALLS overview

100

Excellent

PurityRadar safety score

PWSID

MT0001736

State

Montana

City

COLUMBIA FALLS

Population served

135

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2017. Official EPA record →

Treatment technique · EPA contaminant 0700 health-based began Jul 2015 Resolved

Monitoring & reporting · EPA contaminant 1094 began Jan 2011 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2000 Resolved

Monitoring & reporting · Total coliform began Jul 1997 Resolved

Monitoring & reporting · Total coliform began Oct 1996 Resolved

Monitoring & reporting · Total coliform began Aug 1995 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 1995 Resolved

Monitoring & reporting · Nitrate began Jan 1994 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Monitoring & reporting · Nitrate began Jan 1993 Resolved

Recent enforcement actions

State action · SOX Oct 2017
State action · SIE Jul 2015
State action · SIA Jul 2015
State action · SIF Feb 2014
State action · SOX Jan 2014
State action · SIE Jan 2014
State action · SIA Jan 2014
State action · SOX May 2009

This profile is built from EPA public records for system MT0001736 — 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.