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Concerns are growing about endocrine-disrupting chemicals in the Great Lakes and other surface waters. While eating too much contaminated fish is risky, none of the experts advised avoiding swimming. Lake Michigan, August 2012. Photo: Andy Hall, Wisconsin Center for Investigative Journalism

Concerns are growing about endocrine-disrupting chemicals in the Great Lakes and other surface waters. While eating too much contaminated fish is risky, none of the experts advised avoiding swimming. Lake Michigan, August 2012. Photo: Andy Hall, Wisconsin Center for Investigative Journalism