BIG BEND RANCH SUBDIVISION

GREAT FALLS, MT · ~100 people served

Check your exact address → GREAT FALLS overview

100

Excellent

PurityRadar safety score

PWSID

MT0004261

State

Montana

City

GREAT FALLS

Population served

100

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 Jan 2026. Official EPA record →

Other · EPA contaminant 7000 began Oct 2023 Unaddressed

Other · EPA contaminant 7000 began Jul 2023 Unaddressed

Other · EPA contaminant 7000 began Oct 2022 Unaddressed

Other · EPA contaminant 7000 began Jul 2022 Unaddressed

Monitoring & reporting · Thallium began Jan 2025 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2022 Resolved

Treatment technique · Lead & Copper Rule health-based began Mar 2022 Resolved

Monitoring & reporting · Thallium began Jan 2021 Resolved

Other · EPA contaminant 7000 began Oct 2020 Resolved

Other · EPA contaminant 7000 began Oct 2017 Resolved

Monitoring & reporting · Thallium began Jan 2017 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2016 Resolved

Recent enforcement actions

State action · SOX Jan 2026
State action · SIA Jan 2026
State action · SIE Jan 2026
State action · SOX Dec 2023
State action · SIA Oct 2023
State action · SOX Sep 2023
State action · SIA Jul 2023
State action · SIE Nov 2022

This profile is built from EPA public records for system MT0004261 — 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.