PFAS in Minnesota

Minnesota's investigation into PFAS contamination began in 2002 when 3M notified the MPCA of PFAS in its Cottage Grove production well. In 2004, PFAS were found to have contaminated drinking water supplies in parts of the eastern Twin Cities, and fish tested in the Mississippi River Pool 2 had high concentrations near the discharge from the 3M Cottage Grove facility. Most of the contamination was traced to four dumps or landfills. The East Metro investigations have identified an area of groundwater contamination covering over 150 square miles, affecting the drinking water supplies of over 140,000 Minnesotans.

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