Take a Virtual Tour of the Columbia Boulevard Wastewater Treatment Plant

Portlanders use about 46 gallons of water every day. Find out what happens to that water once it leaves your home, school, or office and makes it way to the Columbia Boulevard Wastewater Treatment Plant, Oregon's largest wastewater treatment plant. At the plant, Environmental Services cleans the water, generates renewable energy, and extracts valuable nutrients that are returned to the soil.

Currently, large areas of the plant are under construction. We are unable to offer in-person tours of the wastewater treatment plant until after construction is completed in 2024. Please check back then.

Learn more about the Secondary Treatment Expansion Program — the largest investment in the plant in 50 years —or find information about:

• The wastewater treatment process
• Portland's sewer and stormwater systems
• How biosolids return nutrients to the soil
• Poop to Power – Turning waste into clean energy