The Neebish Island News

The largest, deepest and coldest Great Lake holds another distinction — the highest levels of the contaminant toxaphene in the region and possibly anywhere in the world... Toxaphene has been shown to damage the immune system, nervous system and lungs and to cause cancer. The principal human exposure comes from eating fish.

It contains more than 670 chemicals and was one of the most heavily used insecticides in the United States.