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Water system · PWSID OR4100841

THURSTON OAKS MHP

PORTLAND, OR · ~38 people served

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

PWSID

OR4100841

State

Oregon

City

PORTLAND

Population served

38

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

24

Violations on record

5

Unaddressed

1

Health-based

23

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2025 Unaddressed
Other · EPA contaminant 7000 began Oct 2025 Unaddressed
Other · EPA contaminant 7000 began Jul 2025 Unaddressed
Other · EPA contaminant 7000 began Oct 2024 Unaddressed
Other · EPA contaminant 7000 began Jul 2024 Unaddressed
Monitoring & reporting · EPA contaminant 3028 began Aug 2025 Resolved
Monitoring & reporting · EPA contaminant 3028 began Jul 2025 Resolved
Other · EPA contaminant 7000 began Jul 2023 Resolved
Other · EPA contaminant 7000 began Oct 2000 Resolved
Other · EPA contaminant 7000 began Jul 2000 Resolved
Monitoring & reporting · EPA contaminant 1085 began Jan 1999 Resolved
Monitoring & reporting · Total coliform began Nov 1996 Resolved

Recent enforcement actions

  • State action · SOX Sep 2025
  • State action · SOX Aug 2023
  • State action · SOX Nov 2004
  • State action · SOX Aug 2004
  • State action · SOX Oct 2002
  • State action · SOX Jul 2001
  • State action · SOX Jul 2001
  • State action · SOX Jul 2001

This profile is built from EPA public records for system OR4100841 — 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.