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The City of Portland, Oregon

Portland Water Bureau

From forest to faucet, we deliver the best drinking water in the world.

Customer Service: 503-823-7770


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Water Quality Summary

The Portland Water Bureau is currently delivering a blend of 65% Bull Run water and 35% groundwater.

Starting on July 10, 2019, the Portland Water Bureau is supplementing the Bull Run supply with water from the Columbia South Shore Well Field. The current expected blend of groundwater to Bull Run water is 65% Bull Run water and 35% groundwater. 

The table below shows a comparison of typical groundwater and Bull Run water quality. The actual water quality experienced by users during groundwater operations may differ from what is shown below based on changes in the wells used during the course of the operation, location of the customer within Portland’s distribution system, water demand, and other operational conditions.

Last Updated: July 10, 2019

  1. Most recent values measured in Bull Run raw or treated water.
  2. Average value at the Groundwater Pump Station Outlet during 2019 supply operation.
  3. (S) denotes a secondary standard established by the EPA as a guidance to assist public water systems in managing drinking water for aesthetic considerations, such as taste, color and odor. These contaminants are not considered to present a risk to human health at this standard.  

For more information about Portland’s drinking water quality, call the Water Quality Line at 503-823-7525 or visit