VALLEY GROVE WATER USERS ASSOCIATION

LOLO, MT · ~30 people served

Check your exact address → LOLO overview

100

Excellent

PurityRadar safety score

PWSID

MT0000490

State

Montana

City

LOLO

Population served

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 Jun 2023. Official EPA record →

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

Other · EPA contaminant 7000 began Jul 2006 Resolved

Monitoring & reporting · Thallium began Jan 2006 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 1994 Resolved

Recent enforcement actions

State action · SOX Jun 2023
State action · SIA Nov 2022
State action · SIE Nov 2022
State action · SOX May 2009
State action · SOX Apr 2007
State action · SOX Feb 2007
State action · SIA Feb 2007
State action · SIA Jan 2007

This profile is built from EPA public records for system MT0000490 — 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.