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The City of Portland, Oregon

Portland Water Bureau

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City Council Approves Capacity, Location, and Technology of Bull Run Filtration Plant

Portland City Commissioners today approved the Water Bureau’s recommendation for capacity, location, and technology for the Bull Run filtration plant.

The new filtration plant is a long-term investment that will remove the microorganism Cryptosporidium from Portland’s drinking water. The filtration plant will also bring additional benefits to Portland water users by making Bull Run supply more reliable, allows Bull Run to be used sooner after an emergency, such as a fire, and possibly reducing the amount of chlorine needed for disinfection.

Portland is working to complete the filtration plant by 2027 under a compliance schedule with the Oregon Health Authority. In the meantime, the Portland Water Bureau is implementing interim measures to protect public health prior to the completion of the filtration plant.

Community Input Guides Filtration Decisions

The Water Bureau began the filtration project by reaching out to you, our customers. Over 1,653 Portland water users participated in an online survey and thousands more access information about the filtration plant through the bureau’s blog and social media such as Facebook and Twitter.

Community members attended a community water forum on Nov. 8 to meet with Water Bureau staff and Commissioner Amanda Fritz and join a conversation about the filtration plant and upcoming changes to reduce lead in water.

More Information

Learn more about upcoming changes to Bull Run treatment, including filtration, at