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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

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

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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 2,500 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

Beneficial Reuse of Biogas

Reusing renewable energy sources

Odor Notification

Receive odor notifications or report odors

Columbia Building

Home to the Wastewater Engineering and Wastewater Construction Management teams

Lagoon Reconstruction

Work is underway

Questions and Answers

Answers to frequently asked questions