WEST SLOPE WATER DISTRICT

PORTLAND, OR · ~11,000 people served

Check your exact address → PORTLAND overview

100

Excellent

PurityRadar safety score

PWSID

OR4100660

State

Oregon

City

PORTLAND

Population served

11,000

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 Jun 2024. Official EPA record →

Other · EPA contaminant 7000 began Jul 2023 Resolved

Treatment technique · Lead & Copper Rule health-based began Mar 2018 Resolved

Monitoring · Lead & Copper Rule began Mar 2018 Resolved

Monitoring · Lead & Copper Rule began Sep 2017 Resolved

Monitoring · Lead & Copper Rule began Aug 2017 Resolved

Monitoring & reporting · Total coliform began Sep 2013 Resolved

Monitoring & reporting · Total coliform began Aug 2013 Resolved

Monitoring & reporting · Total coliform began Apr 2013 Resolved

Max contaminant level (MCL) · Total coliform health-based began Oct 2011 Resolved

Max contaminant level (MCL) · Total coliform health-based began Oct 2010 Resolved

Monitoring & reporting · Total coliform began Apr 2008 Resolved

Monitoring & reporting · Total coliform began Sep 2007 Resolved

Recent enforcement actions

State action · SOX Jun 2024
State action · SOX May 2018
State action · SOX Mar 2018
State action · SOX Oct 2017
State action · SOX Oct 2017
State action · SIF Mar 2017
State action · SOX Nov 2013
State action · SOX Nov 2013

This profile is built from EPA public records for system OR4100660 — 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.