King County Stormwater Management Program Plan
King County's Stormwater Management Program (SWMP) Plan outlines our proposed actions to comply with the Phase 1 Municipal Stormwater National Pollutant Discharge Elimination System (NPDES) Permit issued by the Washington State Department of Ecology.
The SWMP is also attached to our Annual Report, which provides information for our previous year's work related to the Phase I permit.
Download current document here:
Please let us know your feedback to help shape the plan. Comments submitted after March 31 will be considered for next year’s program plan.
Previous SWMP Plans:
- 2022 Stormwater Management Program Plan
- 2021 Stormwater Management Program Plan
- 2020 Stormwater Management Program Plan
- 2019 Stormwater Management Program Plan
- 2018 Stormwater Management Program Plan
- 2017 Stormwater Management Program Plan
- 2016 Stormwater Management Program Plan
- 2015 Stormwater Management Program Plan
- 2014 Stormwater Management Program Plan
- 2013 Stormwater Management Program Plan
- 2012 Stormwater Management Program Plan
- 2011 Stormwater Management Program Plan
- 2010 Stormwater Management Program Plan
- 2009 Stormwater Management Program Plan
For questions about the King County Stormwater Management Program, please contact us via Email.