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  •  Triclosan (8+ / 0-)

    NPR: Triclosan pollutes Minnesota lakes, U of M study finds

    Increasing amounts of triclosan, a common antibacterial agent used in soaps and other products, has been detected in Minnesota lakes, according to the results of a new University of Minnesota study.


    When the researchers analyzed the chemicals in that sediment, they discovered increased concentrations of triclosan and its byproducts since the chemical was patented in 1964 and entered the market in the 1970s. Triclosan is added to everything from cosmetics to toothpaste to dishwashing soap.

    The study was published Tuesday in the journal, Environmental Science and Technology.

    The concentrations of triclosan varied among the lakes. Larger lakes with many wastewater sources had increased concentrations of the chemical and its byproducts since triclosan entered the market. Factors in the triclosan concentration in smaller lakes with a single wastewater source included the extent of triclosan use and changes in water treatment practices. For example, one lake showed decreased concentrations of a triclosan byproduct when UV disinfection technology replaced chlorine at the local wastewater treatment plant.

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