Stormwater Management Plan

Federally required plans are part of our work to protect stormwater quality. The City of Seattle Stormwater Management Plan complies with the Washington State Department of Ecology issued 2019 National Pollutant Discharge Elimination System (NPDES) Phase I Municipal Stormwater Permit. The Plan:

  • Protect water quality
  • Reduces the discharge of pollutants
  • Satisfies requirements of the Clean Water Act
  • Meets state requirements

Our current annual report and attachments, including the current Stormwater Management Plan, are below:

If you would like to comment or have questions about the 2021 Annual Report or 2022 Stormwater Management Plan, please email


Archived Reports

The additional documents below contain the City of Seattle's Annual Report and attachments, as well as the Stormwater Management Plan, since 2007.

2020 Report

2019 Report

2018 Report

2017 Report

2016 Report

2015 Report

2014 Report

2013 Report

2012 Report

2011 Reports

2010 Reports

2009 Reports

2008 Reports

2007 Reports


Additional Resources