Noxious Weeds

• Noxious Weed Control Board
• Noxious Weed List
• 2023 notice of Noxious Weed Control Board Meetings (PDF)

Definition of Noxious Weeds

Noxious weeds are defined by the Washington State Noxious Weed Control Board as non-native, highly destructive, invasive, competitive, and difficult to control or eliminate. These exotic species not only reduce crop yields and destroy native plant and animal habitat, but they can damage recreational opportunities, clog waterways, lower land values, and poison humans and livestock.

Interactive Noxious Weeds Identification Guide

• Noxious Weed ID Guide (PDF)

For More Information

For more information on noxious weeds, including descriptions, pictures and additional links, visit the State Noxious Weed Control Board website or contact the Snohomish County or Washington State Noxious Weed Control Boards (see sidebar).