Palouse-Clearwater Environmental Institute Updated:08/2020

Noxious weeds can best be understood by referring to the Federal Noxious Weed Act of 1974 that defines a noxious weed as,

“…any living stage (including seeds and reproductive parts) of a parasitic or other plant of a kind which is of foreign origin, is new to or not widely prevalent in the U.S., and can directly or indirectly injure crops, other useful plants, livestock, poultry or other interests of agriculture, including irrigation, navigation, fish and wildlife resources, or the public health.”

This description encompasses issues related to economic damage and threats to human interests. The term noxious weeds does not encompass all invasive plant species in a region. To contrast noxious weeds, invasive species, sometime referred to as invasive alien species, are plants that are not native to an area.

In the state of Idaho, there are 67 listed noxious weeds that are categorized into three tiers of concern. However, there may be more than 67 invasive plant species in the state of Idaho.

Contact Palouse-Clearwater Environmental Institute

REMINDER: This listing is a free service of IdahoLandCAN.
Palouse-Clearwater Environmental Institute is not employed by or affiliated with the Idaho Land Conservation Assistance Network, and the Network does not certify or guarantee their services. The reader must perform their own due diligence and use their own judgment in the selection of any professional.


Contact Palouse-Clearwater Environmental Institute

PO Box 8596
Moscow, ID  83843
Phone: 208-8832-1444

Service Area

Services provided in:
  • Benewah County, Idaho
  • Clearwater County, Idaho
  • Latah County, Idaho
  • Nez Perce County, Idaho