Class A Noxious Weeds
Class A weeds are non-native species that are limited in distribution in Washington. State law requires that these weeds be eradicated.
Class B Noxious Weeds
Non-native species are either absent from or limited in distribution in some portions of the state but very abundant in other areas. The goals are to contain the plants where they are already widespread and prevent their spread into new areas. View Class B weeds.
Class C Noxious Weeds
Non-native plants that are already widespread in Washington State. Counties can choose to enforce control, or they can educate residents about controlling these noxious weeds. View Class C weeds.
Monitor List Weeds
Putting plants on the Monitor List allows us to gather more information about them such as their distribution in the State, observable impacts, spread rate, etc.