The State of Michigan is finding industrial chemicals known as PFAS in the tissue of fish. So it's been issuing “Don’t Eat the Fish” advisories along lakes, rivers and streams. But there are concerns about whether state officials are doing as much as they should. Before we get too far into the story, we have to start with a little science. The reason PFAS chemical contamination in fish is such a concern is because of something called bioaccumulation . If there is a toxic substance in the river,