LAKE GROVE WATER DISTRICT

LAKE OSWEGO, OR · ~3,100 people served

Check your exact address → LAKE OSWEGO overview

100

Excellent

PurityRadar safety score

PWSID

OR4100460

State

Oregon

City

LAKE OSWEGO

Population served

3,100

Primary source

SWP

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 Dec 2024. Official EPA record →

Other · EPA contaminant 7000 began Oct 2024 Resolved

Other · EPA contaminant 7000 began Jul 2023 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2022 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2019 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2018 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2011 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2011 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2009 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2009 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2009 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2009 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2008 Resolved

Recent enforcement actions

State action · SIF Dec 2024
State action · SOX Nov 2024
State action · SOX Jul 2023
State action · SOX Oct 2022
State action · SOX Jul 2019
State action · SOX May 2018
State action · SIF Jan 2017
State action · SIF Jul 2012

This profile is built from EPA public records for system OR4100460 — 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.