Noxious Weed List
The Washington State Noxious Weed List is updated every year by the State 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 weeds and it is from this portion of the list where each county gets its list of Class B Designate species. The Class B Designates are a bit more widespread, but still considered required control. However, currently this means that you are only required to stop seed production.
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
Those species on the State list known to be in Okanogan County:
Okanogan Class A—Eradication required.
|Garlic mustard||Mirabilis (Wild Four o'clock)||Syrian bean-caper|
|Meadow clary||Spurge flax|
Okanogan B Designates—Required to stop seed production.
|Common bugloss||Leafy Spurge||Tansy ragwort||Yellow Starthistle|
|Eurasian water-milfoil (Along Okanogan River)||Perennial pepperweed||Thistle-Musk|
|Hawkweed (Non- native) species||Rush Skeleton-weed||Thistle-Plumeless|
|Hoary Alyssum||Scotch broom||Thistle-Scotch|
For a complete list of Washington State noxious weeds, go to the State Noxious Weed Control Board Web site.