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Noxious Weed Control


What Are Noxious Weeds?

Current Weed List

Weed Classifications


Weed Fact Sheets




Report Noxious Weeds

Noxious Weed Control Board

Weed Map - Whatcom County

Boat Inspections

Noxious Weed Class Definitions and Criteria

In an effort to prioritize the necessary work for noxious weed prevention and management, the Washington State Noxious Weed List is separated into three levels of classification. The categories are as follows:

Class A:Flowering Rush - Class A

  • not native to the state
  • limited distribution, new invader
  • prevention of seed production mandated statewide
  • a serious threat
  • goal: eradication

Class B:

  • not native to the state
  • abundant in some areas; unrecorded or of limited distribution in other areas
  • a serious threat to uninfested areas
  • goal: containment and eventual eradication Tansy Ragwort - Class B
  • prevention of seed production in designated areas/counties

Class C:

  • any other noxious weeds
  • abundant or widespread
  • weeds of special interest or concern
  • control at county discretion
English Ivy - Class C