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.

Documents

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

Spreadsheets

Free Viewers

2018 Enclosures

2016 Enclosures

Enclosure 4 (2016): EPA Proposed Additions (xlsx) (63.61 KB)
Enclosure 5 (2016): EPA Data Sources (xlsx) (39.89 KB)
Enclosure 7 (2016): TMDL Litigation Waters (xlsx) (267.47 KB)
Appendix A (2016): Harmful Algal Blooms (xlsx) (18.71 KB)
Appendix B (2016): Aquatic Weeds (xlsx) (24 KB)
Appendix C (2016): Biocriteria (xlsx) (15.76 MB)
Appendix D (2016): Chorophyll A (xlsx) (661.35 KB)
Appendix E (2016): Dissolved Oxygen (xlsx) (12.47 MB)
Appendix F (2016): E coli (xlsx) (2.53 MB)
Appendix G (2016): Enterococci (xlsx) (380.22 KB)
Appendix H (2016): pH (xlsx) (3.83 MB)
Appendix I (2016): Phosphorus (xlsx) (3.08 MB)
Appendix J (2016): Temperature (xlsx) (9.79 MB)
Appendix K (2016): Toxics (xlsx) (1.1 MB)

Transmittal Letter (2018): Partial Approval/Partial Disapproval of Oregon's Final 2012 303(d) List (pdf) (495.19 KB, December 20, 2018)
EPA's final decision transmittal to the Oregon Dept. of Environmental Quality.
Enclosure 1 (2018): EPA Rationale for Action to Approve Oregon’s 2012 With No Listings for Aquatic Life Impairments in Marine Waters and Action to Add Waters to Oregon’s 2012 303(d) List (pdf) (419.82 KB)
Summary of the basis for EPA's final decision.
Enclosure 2 (2018): Response to Comments (pdf) (1.03 MB)
EPA's responses to public comments on its 2016 partial approval/disapproval of Oregon's 2012 303d list.
Transmittal Letter (2016): Partial Approval/Partial Disapproval of Oregon's Final 2012 303(d) List (pdf) (63.08 KB, December 21, 2016)
Enclosure 1 (2016): Review of Oregon's 2012 Integrated Report (pdf) (101.1 KB)
Enclosure 2 (2016): Request for Public Comment on Ocean Acidification Impacts in Oregon Marine Waters (pdf) (301.66 KB, December 22, 2016)
Enclosure 3 (2016): Disapproved Delistings EPA Proposes for Category 5 (pdf) (30.83 KB)
Enclosure 6 (2016): EPA Listing Methodology for Oregon 2012 303(d) List (pdf) (1.06 MB)
Enclosure 8 (2016): EPA Corrections to ODEQ 2012 (pdf) (33.18 KB)