Managing stormwater in King County
Stormwater Management Program (SWMP) plan
Our proposed permit actions for the current calendar year.
NPDES annual report
Actions we take each year to comply with our Phase I Municipal Stormwater NPDES Permit.
Stormwater Management Action Pan
Information about the Stormwater Management Action Plan (SMAP).
Site management plan
Site management plan (the SiMPla) for County-owned properties.
Stormwater videos
About stormwater in King County.