Minnesota lakes contains triclosan, say researchers. An anti-bacterial pesticide found in soap, toothpaste and many other products, triclosan is currently being (slowly) evaluated by both EPA and FDA. Meanwhile, many companies have already pulled it from their list of ingredients in response to concerns about the chemical's health and environmental harms.
University of Minnesota scientists analyzed sediment from eight lakes to understand trends in contaminant levels over time. They found that levels of triclosan and its byproducts have gone up steadily since the chemical entered the market in the 1970s.