Noxious weeds are non-native plants that have been introduced to Washington through human actions.
Because of their aggressive growth and lack of natural enemies in the state, these species can be highly destructive, competitive, or difficult to control. These exotic species can reduce crop yields, destroy native plant and animal habitat, damage recreational opportunities, clog waterways, lower land values, create erosion problems and fire hazards, and poison humans and livestock. The Whatcom County Noxious Weed Control Board then holds a public hearing to adopt the county list . The Whatcom County Noxious Weed List is made up of all Class A weeds, Class B-designates, and any selections by the County Board from the Class B or Class C weed list. Any Class A or Class B-designates on the Washington State List are mandatory for adoption and control at the county level.