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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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CBWTPThe Wastewater group operates Portland's wastewater collection and treatment system. Solids removed during the sewage treatment process are recycled into biosolids, a beneficial soil amendment. The Wastewater group monitors, operates, and maintains nearly 100 sewage pump stations, the Columbia Boulevard and Tryon Creek wastewater treatment plants, and the sanitary sewage and stormwater collection system.


The Wastewater Group protects public health, water quality, and the environment by operating and maintaining wastewater and stormwater collection and treatment facilities and managing programs in a manner that assures compliance with all applicable permits, regulations and contracts.

Tryon Creek Wastewater Treatment Plant

City of Portland sewage treatment plant in Lake Oswego

Wastewater Collection System

Portland's system serves over half a million customers

Revegetation Program

Natural areas, urban tree canopy, green stormwater infrastructure, invasive plants early detection

Glossary of Terms

Guide to wastewater treatment terms