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About us

About us

The noxious weed control program works throughout King County to prevent and reduce the economic, environmental and social impacts of noxious weeds in King County, Washington. Our focus is to provide education and technical assistance to landowners and public agencies to help everyone find the best control options for noxious weeds on each site and to reduce the overall impact of noxious weeds throughout the county.



Prevention, education and technical assistance are the keys to the success of the King County Noxious Weed Control Program. Noxious weeds are found everywhere in King County: in urban, suburban and rural areas; on developed and undeveloped land; in gardens, farmland, forests and natural areas, as well as in lakes, rivers, streams and in Puget Sound. Weeds are everyone's problem, directly or indirectly.

Our vision is healthy and resilient landscapes in King County where the environmental, economic and social impacts of noxious weeds are minimized.


To provide benefits to the environment, recreation, public health and economic resources of King County by preventing and minimizing harmful impacts of noxious weeds.



Go to Weed Board Meetings
Working under the authority of the King County Noxious Weed Control Board and the Washington State Noxious Weed Control Law, Chapter 17.10 RCW, the objectives of the noxious weed program include:


  • Eradicate infestations of Class A noxious weeds;
  • Control regulated Class B and Class C noxious weeds to below levels of significant impact;
  • Carry out early detection and rapid control response of infestations of new or recently detected noxious weeds with restricted distributions;
  • Support the management of widespread noxious weeds, and facilitation of more effective, coordinated landscape-scale control effort;
  • Educate the community about prevention and management of noxious weed infestations and increase participation in noxious weeds control activities;
  • Assist and educate landowners to be responsible stewards of the land and aquatic resources of the County by eliminating or minimizing the degrading impact of invasive noxious weeds; and
  • Provide quality, timely and responsive service to the residents of King County.

Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact staff, see the Noxious Weed Control Program Directory,
send an email,
or call 206-477-WEED (206-477-9333).