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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Suite 1000, Portland, OR 97204

Columbia Boulevard Wastewater Treatment Plant

The Columbia Boulevard Wastewater Treatment Plant is part of a sewage collection and treatment system that serves about 600,000 customers. The plant operates every day around the clock to manage, monitor and adjust the collection system and treatment process. Nearly 100 sewage pump stations and more than 2,300 miles of pipes convey wastewater to the facility 24 hours a day.

Columbia Boulevard Treatment Plant Overview

Portland's largest wastewater treatment facility

Treatment Process

What happens when sewage reaches the plant

Beneficial Reuse of Portland Biosolids

Natural, nutrient-rich by-products of wastewater treatment

Co-Generation Projects

Using renewable energy sources

Columbia Building

The new building is home to the Wastewater Engineering and Wastewater Construction Management teams

Questions and Answers

Answers to frequently asked questions

Odor Notification

Receive odor notifications or report odors

Heartbleed Security Notice

A serious security vulnerability known as "Heartbleed" was recently discovered in OpenSSL, a popular software library commonly used by many websites on the internet to encrypt communication between a user's computer and a web server. is NOT affected by this vulnerability as it does not use the OpenSSL software library. Please rest assured we are dedicated to protecting your security on this website.