Researchers with the School of Freshwater Sciences at the University of Wisconsin-Milwaukee have found elevated levels of metformin, a diabetes treatment drug, in Lake Michigan. Levels of 40 ppb were detected outside one treatment plant. About two miles away, the levels dropped to 120 parts per trillion.“It was kind of a surprise,” says UW-Milwaukee professor Rebecca Klaper in a Milwaukee Journal Sentinel article. "It was not even on our radar screen. I said, ‘What is this drug?’”The study focused on the effects of metformin and other contaminants on fathead minnows. According to the Journal Sentinel, the research indicates that other
