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Water system · PWSID MT0002120

HIDDEN HEIGHTS HOA

MISSOULA, MT · ~65 people served

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

PWSID

MT0002120

State

Montana

City

MISSOULA

Population served

65

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

27

Violations on record

0

Unaddressed

4

Health-based

68

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2019. Official EPA record →

Monitoring · Lead & Copper Rule began Sep 2018 Resolved
Other · EPA contaminant 7000 began Jul 2018 Resolved
Monitoring & reporting · Thallium began Jan 2018 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2014 Resolved
Other · EPA contaminant 7000 began Jul 2012 Resolved
Monitoring & reporting · Total coliform began Aug 2011 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2010 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2010 Resolved
Monitoring & reporting · Total coliform began Nov 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2005 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2005 Resolved

Recent enforcement actions

  • State action · SIF Feb 2019
  • State action · SOX Jan 2019
  • State action · SIA Jan 2019
  • State action · SIE Jan 2019
  • State action · SIE Oct 2018
  • State action · SIA Oct 2018
  • State action · SOX Oct 2018
  • State action · SOX Aug 2018

This profile is built from EPA public records for system MT0002120 — 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.