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The King County Noxious Weed Control Program provides many services to county residents, including:

    County weed crew at Scot's broom pull
  • Plant identification
  • Direct assistance and cost share for priority noxious weeds
  • Informational publications and workshops
  • Information on the best methods for control or eradication
  • Facilitating weed management efforts by working with volunteer and landowner groups
  • Annual surveys on roads and other areas of the county for early detection of noxious weeds

For information about the program's projects, activities and achievements, see the program's Annual Reports and the Knotweed Control Projects.

Specialist in a field of purple loosestrife

The King County Noxious Weed Control Board adopts the Rules and Regulations as necessary for the administration of the County's noxious weed control program. The Board carries out the mandates of the State Weed Control Law, Chapter 17.10 RCW (external link). The Program implements the law through education and outreach to all landowners. By institution and authority of the King County Council, all lands within the County, except Indian and Federal, are subject to the direction of the King County Noxious Weed Control Board with respect to control of listed noxious weeds.

Weed crew members in action:

communications specialist
specialist rappelling
gps mapping
gps training

Learn who we are and answer frequently asked questions


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).