Thank you for helping us test the site. If you need the current site, please visit PortlandOregon.gov.

Tour Columbia Boulevard water treatment plant

See Oregon's largest wastewater treatment plant in action. Free guided tours of the Columbia Boulevard Wastewater Treatment Plant are offered 4 days each month. Tour requests must be made online and at least 7 days in advance.

Expect to receive confirmation of your tour date and time within one week of submitting your tour request.