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It's the Law

Invasive Species

Illustration of a Zebra Mussel
Illustration of a Zebra Mussel

Eurasian watermilfoil, zebra mussels, quagga mussels, and New Zealand mud snails are some of the invasive species of concern in Idaho. Often spread between waterways by hitching a ride on vessels and trailers, these non-native species can damage the environment and hurt the economy.

Due to the increasing threat of invasive species, the Idaho legislature passed The Idaho Invasive Species Act of 2008.

  • Possession or transport of aquatic invasive species (AIS) is prohibited by law. This includes things like weeds on a boat trailer, snails in bilge water, or zebra mussels on a boat motor.
  • Watercraft inspection stations have been established in locations throughout the state to ensure boats are free of AIS. All watercraft (including canoes, kayaks, and paddleboards) are required to stop if an open station is encountered. Inspection is quick and easy if the watercraft is clean, drained, and dry.
  • Anyone who violates the regulations in the Act may be fined up to $3,000, imprisoned in county jail for up to 12 months, or both. A person may receive additional civil penalties of up to $10,000.

Help prevent the spread of invasive species in Idaho by using this checklist every time you exit a body of water.

  • Clean any visible mud, plants, or animals from your boat.
  • Drain all water, including from the lower outboard unit, ballast, livewell, etc. Dispose of debris and bait in the trash.
  • Dry all areas of your boat and equipment.

Please visit, or call 1-877-336-8676 for more information.