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Water system · PWSID MT0001778

ROCKPORT COLONY

PENDROY, MT · ~92 people served

Check your exact address → PENDROY overview
100
Excellent
PurityRadar safety score

PWSID

MT0001778

State

Montana

City

PENDROY

Population served

92

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

62

Violations on record

0

Unaddressed

7

Health-based

52

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2021. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Dec 2020 Resolved
Max contaminant level (MCL) · Thallium health-based began Jan 2018 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2017 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2012 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2012 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2012 Resolved
Max contaminant level (MCL) · Thallium health-based began Jan 2012 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2011 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2011 Resolved
Monitoring & reporting · EPA contaminant 2015 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2031 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2010 began Jan 2011 Resolved

Recent enforcement actions

  • State action · SOX Jan 2021
  • State action · SIA Jan 2021
  • State action · SFL Oct 2018
  • State action · SOX Sep 2018
  • State action · SO8 Mar 2018
  • State action · SIF Mar 2018
  • State action · SIA Mar 2018
  • State action · SIE Mar 2018

This profile is built from EPA public records for system MT0001778 — 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.