Wisconsin's Invasive Species Identification, Classification and Control Rule
Chapter NR 40

The Legislature directed the Department to establish a statewide program to control invasive species, and to promulgate rules to identify, classify and control invasive species for purposes of the program.

Chapter NR 40, Wisconsin's Invasive Species Identification, Classification and Control Rule helps citizens learn to identify and minimize the spread of plants, animals and diseases that can invade our lands and waters and cause significant damage.

• Invasive species are non-native plants, animals and pathogens whose introduction causes or is likely to cause economic, or environmental harm or harm to human health.
• Invasive species can alter ecological relationships among native species and can affect ecosystem function and structure, economic value of ecosystems, and human health.
• There are many non-native plants that are invasive in forests, grasslands, wetlands, lakes and rivers. They displace native species and disrupt wildlife habitat.
• Invasive species threaten Wisconsin's traditions, environment and economy in every corner of our lands and waters.