The State Weed List is organized into three (3) categories.
Class A weeds are non-native species with a limited distribution. Preventing new infestations and eradicating existing infestations is the highest priority. Eradication is required by law.
Class B weeds are non-native species presently limited to portions of the state or county. Class B species are designated for control in regions where they are not yet widespread. Preventing infestations in these areas is a high priority. In regions where a Class B species is already abundant, control is decided at the local level, with containment as the primary goal.
Class C weeds are non-native weeds. Many of these species are widespread. Long-term programs of suppression and control are a local option, depending upon local threats and the feasibility of control in local areas.