GLENMORRIE COOPERATIVE ASSN

LAKE OSWEGO, OR · ~300 people served

Check your exact address → LAKE OSWEGO overview

100

Excellent

PurityRadar safety score

PWSID

OR4100459

State

Oregon

City

LAKE OSWEGO

Population served

300

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 Jul 2024. Official EPA record →

Other · EPA contaminant 7000 began Jul 2024 Resolved

Other · EPA contaminant 7000 began Jul 2023 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2017 Resolved

Monitoring & reporting · EPA contaminant 3014 began Nov 2010 Resolved

Monitoring & reporting · Total coliform began Aug 2006 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2004 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2003 Resolved

Other · EPA contaminant 7000 began Oct 1999 Resolved

Monitoring & reporting · Total coliform began Dec 1992 Resolved

Monitoring & reporting · Total coliform began Dec 1991 Resolved

Monitoring & reporting · Total coliform began Nov 1991 Resolved

Recent enforcement actions

State action · SOX Jul 2024
State action · SOX Feb 2024
State action · SOX Sep 2020
State action · SOX Jan 2011
State action · SIA Dec 2010
State action · SO0 Dec 2010
State action · SO0 Dec 2010
State action · SOX Oct 2006

This profile is built from EPA public records for system OR4100459 — 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.