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Noxious Weed List

The Washington State Noxious Weed List is updated every year by the Washington State Noxious Weed Control Board.  It contains all of the Statewide Class A noxious weeds.  The Class A weeds are of very limited distribution in Washington State and are in a category of mandatory eradication of the entire plant.
 
The State List also contains a Class B category of noxious weeds and it is from this portion of the list where each county receives its list of Class B Designate species.  The Class B Designate Noxious Weeds are a bit more widespread, but still considered required control.  However, currently this means that you are only required to stop plants from propagating.

Class C Noxious Weeds are fairly widespread and it is not considered feasible to require eradication.  We do recommend that you do control these species to stop further spread, however we do not require control unless we get complaints from adjacent property owners.

The Okanogan County Noxious Weed Control Board may also vote to select Class B or Class C noxious weeds from the Washington State Noxious Weed List, which are not mandated for control by the state, and mandate control of them in Okanogan County (or portions there of).  This category of weeds is known as County Select Noxious Weeds.  These species are often selected for control because they are of high concern within the county. 

Those species on the State list known to be in Okanogan County include:
Okanogan County Class A Noxious Weeds
Landowners are required to eradicate all plants  2023 Spray Applicator's Vendor List 

        Garlic Mustard                            Meadow Clary                           Mediterranean Sage
                                
        Distribution Map                               Distribution Map                                  Distribution Map
            
  Mirabilis (aka Wild Four o'clock)                           Syrian Bean-Caper
                
        Distribution Map                           Distribution Map
Okanogan County Class B Designates Noxious Weeds
Landowners are required to stop propagation of plants  2023 Spray Applicator's Vendor List 

  Common Bugloss                     Hawkweed (Meadow)             Hawkweed (Orange)
                                    
    Distribution Map                         Distribution Map                      Distribution Map

   Hoary Alyssum                             Leafy Spurge                               Musk Thistle
                                             
 Distribution Map                        Distribution Map                        Distribution Map

 Perennial Pepperweed                Plumeless Thistle                         Rush Skeletonweed
                                 
      Distribution Map                       Distribution Map                            Distribution Map

     Scotch Broom                               Scotch Thistle                                 Tansy Ragwort
                                             
    Distribution Map                         Distribution Map                             Distribution Map
     
  Yellow Starthistle
 
   Distribution Map
Okanogan County Select Noxious Weeds
Control is required in all public right of ways and parking areas


 Longspine Sandbur                        Puncturevine                              Spurge Flax
                                   
     Distribution Map                       Distribution Map                     Distribution Map

For a complete list of Washington State noxious weeds, please visit the State Noxious Weed Control Board Website.