Quagga and zebra mussels came to North America in the ballast tanks and on the anchor chains of large, transoceanic ships that entered the Great Lakes.

Inspectors will ask you where and when your watercraft was last used.

Zebra and quagga mussels can create long-term taste and odor issues in drinking water supplies and clog water intake structures.

Aquatic invasive species can clog water intake pipes and impede the flow of water to municipal water supplies, irrigation operations, and power plants.

Inspectors will only need to do a visual inspection of the exterior of the watercraft.

Inspectors rely on both your answers to survey questions as well as a visual and physical inspection of the watercraft to make their risk determination.