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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.


Enter to Tour the Plant

Deadline to enter for the tour is June 21, 2013

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

Engineering Office Building

New plant entrance and office space

Design Data

Treatment plant statistics

Questions and Answers

Answers to frequently asked questions

Summer 2012 Newsletter

Marking 60 years of wastewater treatment

Odor Notification

Receive odor notifications or report odors