MDH and MPCA officials say the most likely source of the elevated levels of PFOS in Lake Elmo is surface and groundwater contaminated by the former 3M disposal site in Oakdale. PFOS levels in Lake Harriet have been declining since the source of the PFOS – the nearby Douglas Corporation plating facility – was addressed starting in 2010.
Department of Health advises against eating Lake Harriet largemouths, all Lake Elmo fish
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