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 "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 "B-Designate" species. The 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
property owners.
Those species on the State list known to be here:
Okanogan Class A - eradication required
| Mirabilis (wild four o'clock) | Spurge Flax | Buffalobur | Velvetleaf |
| Syrian Bean Caper |
Okanogan B-Designates - required to stop seed production
| Musk Thistle | Scotch Thistle | Leafy Spurge | Dalmatian Toadflax |
| Rush Skeletonweed - considered a New Invader | Yellow Starthistle - considered a New Invader | Yellow Toadflax - considered a New Invader | Orange & Yellow Hawkweeds - considered a New Invader |
| Common Bugloss - considered a New Invader | Hoary Alyssum | Longspine Sandbur | |
For a complete list of Washington State noxious weeds, go to the
State Weed Control Web site