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Impaired Waters and TMDLs

Partial Approval and Partial Disapproval of Oregon 2012 303d List

After considering comments received from the public, EPA revised its 2016 partial approval/partial disapproval action and identified a total of 999 water quality limited segment/pollutant pairs (WQLS) for inclusion on Oregon's 2012 303(d).

Rationale and data for EPA's decision are provided under "Documents" below.

EPA accepted public comments this action from December 22, 2016, to April 3, 2017.


Please note that some enclosures and appendices are provided as spreadsheet files (see yellow sidebox).

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.