GRANITE PARK WATER ASSOCIATION

BILLINGS, MT · ~250 people served

Check your exact address → BILLINGS overview

100

Excellent

PurityRadar safety score

PWSID

MT0004563

State

Montana

City

BILLINGS

Population served

250

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 Aug 2023. Official EPA record →

Other · EPA contaminant 7000 began Jul 2023 Resolved

Monitoring & reporting · Thallium began Apr 2023 Resolved

Monitoring & reporting · EPA contaminant 3014 began Sep 2020 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2018 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2018 Resolved

Monitoring & reporting · EPA contaminant 3014 began Nov 2016 Resolved

Monitoring & reporting · EPA contaminant 2039 began Jan 2015 Resolved

Monitoring & reporting · Lead & Copper Rule began Dec 2014 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2013 Resolved

Monitoring & reporting · Gross alpha began Jan 2009 Resolved

Monitoring & reporting · Thallium began Jan 2009 Resolved

Monitoring & reporting · Gross alpha began Jul 2008 Resolved

Recent enforcement actions

State action · SIF Aug 2023
State action · SOX Jul 2023
State action · SIA Jul 2023
State action · SIE Jul 2023
State action · SIA Jul 2023
State action · SOX Jul 2023
State action · SOX Aug 2022
State action · SIA Oct 2021

This profile is built from EPA public records for system MT0004563 — 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.