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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 100% Bull Run water.

From June 20, through October 17, 2018, the Portland Water Bureau supplemented the Bull Run supply with water from the Columbia South Shore Well Field. Since September, the expected blend of groundwater to Bull Run water was 45-55% groundwater. 

The table below shows a comparison of typical groundwater and Bull Run water quality from past results. The actual water quality experienced by users may have differed depending on changes in the wells used during the course of the operation.

Last Updated: October 17, 2018

  1. Most recent values measured in Bull Run raw or treated water.
  2. Most recent values measured at the Groundwater Pump Station Outlet.
  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