Class B noxious weeds are nonnative species whose distribution is limited to portions of Washington State, but may be widespread in other parts.
- Class B noxious weeds are designated for mandatory control in regions where they are not yet widespread. Prevention of new infestations in these areas is the primary goal.
- In regions where a Class B species is already abundant, control is decided at the local level. Containment of these weeds is the primary goal so that they do not spread into un-infested regions.
- The Washington State Noxious Weed Board or a County Noxious Weed Board can designate a Class B noxious weed for mandatory control.
- Class B designations at the state level are listed in WAC 16-750-011 and are based on our designation region map, which breaks up the state into 6 regions.
Please contact your County Weed Board to learn which species are designated for control in your area.
Identify a noxious weed