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Noxious weeds are a danger to our environment and the economy. These introduced species cost our region millions of dollars in lost agricultural production, environmental degradation and added maintenance costs.  Once invasive plants spread to natural areas, they harm native plants and wildlife and can be impossible to eradicate.

Identify and learn about weeds and invasive plants

Locate noxious weeds in King County

Report an infestation

Report a weed
  • Report a noxious weed in King County, Washington with our web form or mobile app. We need your help to find early infestations while we still have a chance to stop them, and to learn more about where weeds are impacting people and the environment in King County.

Control noxious weeds

Participate

To contact us, please see the staff directory for the King County Noxious Weed Control Program, call 206-477-WEED (206-477-9333) or send us an e-mail.  Program offices are located in the King Street Center Building at 201 S. Jackson St., Suite 600, Seattle, WA 98104.

Languages

Find information on noxious weed identification and control in multiple languages:

Español (Spanish)

Tiếng Việt (Vietnamese)

中文: 简体版 (Simplified Chinese)

Af-Soomaali (Somali)

русский язык (Russian)