Traveling with plants attached to your boat/trailer in Washington State is:

No aquatic invasive plants have been found to be growing in Lake Whatcom.

Zebra and quagga mussels can attach themselves to hard surfaces but can be removed quite easily with a damp cloth.

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

If you boat on a lake infested with Eurasian watermilfoil or other aquatic weeds, what is the best way to prevent the plants from spreading somewhere else?

Aquatic invasive species can cause long-term taste and odor issues in drinking water supplies.