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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

More Contact Info

treatment plant tourColumbia Boulevard Wastewater Treatment Plant Tour Request

Take a guided tour of Oregon's largest wastewater treatment plant.

Use the form below to request a free tour. Call 503-823-2400 with questions or for more information.

Tour Information

  • Tours are on Tuesdays and Thursdays of the third and fourth weeks of each month.
  • Tour hours are 9:30 a.m. to 11:00 a.m. and noon to 1:30 p.m.
  • Tours last approximately 1.5 hours.
  • Treatment plant staff can accommodate tours for both individuals and groups of no more than 40 people.
  • Walking tours cover uneven surfaces, stairs and tunnels. Please dress appropriately and wear close-toed shoes.
  • Tours are suitable for grades 5 and up or ages 10 and older.
  • School groups (grades 5-12) must provide one adult chaperone for every ten students.

We will provide confirmation of your tour within one week of submitting your tour request.

Please note: Severe weather can disrupt treatment plant operations and may force tour cancellations. In the event of a cancellation, we will contact you to reschedule your tour.


Treatment Plant Tours

Choose tour date preferences

The treatment plant conducts tours on four days each month. Tour days are Tuesdays and Thursdays on the third and fourth weeks of the month. Tours begin at 9:30 a.m. and noon. Tour requests must be submitted at least 7 days in advance.
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Please choose your preferred tour start time.
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Please choose your preferred tour start time.
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Please note: Plant staff may cancel/reschedule the tour unexpectedly due to severe weather, power outages or other operational factors that would cause insufficient staffing or pose a risk to those on tour. In the event of a cancellation, we will notify you as soon as practical, and reschedule the tour.

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