Water Quality

​​​DEQ is conducting a Triennial Review process to review Oregon water quality standards and determine priority projects for the next three years. During this process, DEQ took public input on a list of priority water quality standards review and revision needs. The result will be a report that outlines the projects that DEQ's water quality standards program will complete or initiate between 2021 and 2023. DEQ plans to complete the review process by June 30, 2021​. The final report will be provided to EPA and posted on this website.

The Clean Water Act requires states to periodically review and revise water quality standards and hold public hearings about those proposed changes. The purpose of revising the standards is to incorporate new environmental scientific information, meet federal requirements or improve clarity and program implementation. The Triennial Review itself doesn't result in changes in water quality standards, but it will prioritize the projects for water quality standard changes.

Public comment for the 2021 Triennial Review is now closed​ 

DEQ accepted comment on the list of priority water quality standards review and revision needs for the 2021 Triennial Review from April 7, 2021 through May 24, 2021. During this time, DEQ held an informational meeting on April 21, 2021 and a public hearing on May 4, 2021. 

Public meeting materials

​​Documents for public comment

Previous Triennial Review documents



Debra Sturdevant, 503-229-6691
Kaley Major, 503-229-6121​

If you have questions please email:


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DEQ will also add new information about the Triennial Review to this web page at key milestones.