Portland and the federal government

Learn about our sanctuary city status, efforts to block federal overreach: Portland.gov/Federal

Secondary Treatment Expansion Program

Project
Public Works
Environmental Services is making the largest investment in its North Portland wastewater treatment plant in 50 years. The Secondary Treatment Expansion Program (STEP) will expand, upgrade, and replace equipment and buildings that have been in service since the 1970s.
Aerial photo of wastewater treatment plant with four areas shaded in yellow on northern end of campus to indicate project area. View full size image

Featured content

An aerial view of a wastewater treatment plant with slow moving waterway on left.

Secondary Treatment Expansion Program

An aerial view fo the Columbia Boulevard Wastewater Treatment Plant with construction going on around the plant.

Take a Virtual Tour of the Columbia Boulevard Wastewater Treatment Plant

Blue close up photograph of microorganisms

About the Wastewater Treatment Process

About the STEP Labor-Management-Community Oversight Committee

Large diameter pipe with golf cart driving down the center.

About the Big Pipe Project

A farm with wind turbines and a tractor

Biosolids return nutrients to the soil

Contact

Debbie Caselton (she/her)

Community Outreach
debbie.caselton@portlandoregon.gov
503-823-2831
711Oregon Relay Service

Related offices, programs, and projects

Two large circular tanks at a wastewater treatment plant

The STEP Labor-Management-Community Oversight Committee

Aerial view of bridges over the Willamette River in Downtown Portland

Environmental Services

A City of Portland pickup truck is fueled at an RNG fueling station located at the Columbia Boulevard Wastewater Treatment Plant

Recovering Resources

Photo shows people walking in the rain with umbrellas with bikes and rain planters along the sidewalk.

Managing Stormwater

Photo show tanks of bubbly water that are part of an on-site pretreatment facility for treating wastewater.

Preventing Pollution

A deep trench in a street with large concrete sewer pipe laying next to it waiting for installation

Connecting to the Sewer

Past meetings and hearings

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