1120 SW 5th Ave, Suite 613, Portland, OR 97204
The Oregon Department of Environmental Quality (DEQ) has established total maximum daily loads (TMDLs) for local rivers, which specify the maximum amount of pollutants that various entities can contribute to the Willamette River and tributaries that do not meet water quality standards.
As one of those entities, the City of Portland has developed a TMDL Implementation Plan that identifies key management strategies to reduce TMDL pollutants from nonpoint (i.e., diffuse) sources and improve water quality. Many of these strategies are similar to those used to reduce the discharge of pollutants from the City’s municipal separate storm sewer system (MS4) to receiving waters, since the strategies are applied citywide and are relevant to reducing pollution from both point (MS4) and nonpoint sources. The City submits an annual TMDL status report to DEQ to report on the implementation of the strategies.
Portland's 12th annual status report on fiscal year 2019-20. This TMDL report is integrated with the MS4 report as Appendix A. Access referenced content at page "Annual Compliance Reports" at link "FY 2019-2020 Permit Year 25 Annual Compliance Report".
Portland's 11th annual status report on fiscal year 2018-19. This TMDL report is integrated with the MS4 report as Appendix A. Access referenced content at page "Annual Compliance Reports" at link "FY 2018-2019 Permit Year 24 Annual Compliance Report".
Portland's TMDL 5-year evaluation and 10th annual status report. This report provides info about programs the City engaged over the past 5 years to reduce TMDL pollutants.
Portland's ninth annual TMDL program status report for fiscal year 2016-17. This report provides information about activities the City accomplished during the year to protect watershed health and implement TMDL pollutant reduction strategies.
Portland's eighth annual status report for fiscal year 2015-16. This report provides information about activities the City accomplished during the year to protect watershed health and implement our TMDL strategies.
Seventh annual TMDL status report for fiscal year 2014-15.
City of Portland TMDL Implementation Plan identifying key strategies the City uses to reduce TMDL pollutants in order to restore and protect water quality in the Willamette River and local tributaries.