"OTTAWA -- Canada and the United States have identified eight substances in the water of the Great Lakes as chemicals of mutual concern under the Canada-U.S. Great Lakes Water Quality Agreement. These chemicals are potentially harmful to human health or the environment or both.

Canada and the United States work together under the agreement to identify chemicals that are in the Great Lakes because of human activities and that cause mutual concerns.

After a comprehensive scientific review process and public consultations, Canada’s Environment and Climate Change Minister Catherine McKenna and U.S. Environmental Protection Agency Administrator Gina McCarthy announced the chemicals of greatest concern ...."

Environment News Service had the story May 31, 2016. [2]