City of Portland, OR
12/19/2025 | News release | Distributed by Public on 12/19/2025 18:37
Treated wastewater that was not dechlorinated enters the Columbia Slough outside the City’s primary wastewater treatment plant
News Article
On Friday, December 19, a leak near a pump station at the Columbia Boulevard Wastewater Treatment Plant in North Portland was observed to be leaking wastewater to the Columbia Slough.
Published
December 19, 2025 4:24 pm
The leaking wastewater is treated effluent leaving the treatment plant before the final dechlorination step.
Crews are investigating potential impacts. At this time, no public precautions are needed.
About Environmental Services
Environmental Services - the City of Portland's sewer and stormwater utility - protects public health and the environment by collecting and recovering resources from the city's wastewater, managing stormwater, and restoring and protecting Portland's rivers, streams, and watersheds.
City of Portland, OR published this content on December 19, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on December 20, 2025 at 00:37 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]