How do quagga and zebra mussels spread from an affected water body to another water body?

In the state of Washington you can be fined for towing a boat/trailer on the road with plant fragments attached.

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.

What are inspectors looking and feeling for when they conduct a physical watercraft inspection?

It only takes one plant fragment to start a new population of Eurasian watermilfoil.

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