ROCKY BOY AGENCY WATER SYSTEM

BOX ELDER, MT · ~1,442 people served

Check your exact address → BOX ELDER overview

100

Excellent

PurityRadar safety score

PWSID

083090079

State

Montana

City

BOX ELDER

Population served

1,442

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 →

Monitoring & reporting · EPA contaminant 1094 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 1094 began Oct 2022 Resolved

Monitoring & reporting · EPA contaminant 1094 began Jul 2022 Resolved

Monitoring & reporting · EPA contaminant 2955 began Apr 2020 Resolved

Monitoring & reporting · EPA contaminant 2991 began Apr 2020 Resolved

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

Other · EPA contaminant 7000 began Jul 2014 Resolved

Monitoring & reporting · EPA contaminant 2969 began Jan 2014 Resolved

Monitoring & reporting · EPA contaminant 2955 began Jan 2014 Resolved

Monitoring & reporting · EPA contaminant 2977 began Jan 2014 Resolved

Monitoring & reporting · EPA contaminant 2378 began Jan 2014 Resolved

Monitoring & reporting · Cyanide began Jan 2014 Resolved

Recent enforcement actions

State action · SOX Aug 2023
State action · SOX Sep 2020
State action · SOX Dec 2019
State action · SO0 Oct 2017
State action · SO0 Oct 2017
State action · SO0 Oct 2017
State action · SO0 Oct 2017
State action · SOX Jun 2015

This profile is built from EPA public records for system 083090079 — 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.