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The City of Portland, Oregon

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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

More Contact Info

Columbia Boulevard Wastewater Treatment Plant

Columbia Boulevard treatment plant The Columbia Boulevard Wastewater Treatment Plant is part of a sewage collection and treatment system that serves more than 600,000 customers. Nearly 100 sewage pump stations and more than 2,500 miles of pipes convey wastewater to the facility 24 hours a day. The plant operates every day around the clock to manage, monitor and adjust the collection system and treatment process.

Columbia Boulevard Treatment Plant Overview

Portland's largest wastewater treatment facility

Treatment Process

What happens when sewage reaches the plant

Renewable Natural Gas: Turning waste methane into clean energy

Find out about Portland's Poop to Power Project

Beneficial Reuse of Biogas (Methane)

Reusing renewable energy sources

Beneficial Reuse of Portland Biosolids

Natural, nutrient-rich by-products of wastewater treatment

Design Criteria and Capacities of Processes

Odor Notification

Receive odor notifications or report odors

Community Advisory Committee

Committee members, mission, meeting minutes

CAC Meeting Minutes

Evolution of Portland Wastewater Treatment

How we got here

Questions and Answers

Answers to frequently asked questions