April 2003

In the Leach class action against DuPont, a West Virginia judge rules that PFOA is “toxic and hazardous to humans” and orders DuPont to pay for medical testing of up to 50,000 people.


The Minnesota Department of Health develops Health-Based Values for PFOA and PFOS; the department also begins partnering with the Minnesota Pollution Control Agency to investigate PFAS in drinking water near the 3M Cottage Grove plant and related legacy waste disposal sites.

January 2002

The West Virginia Department of Environmental Protection concludes that PFOA in drinking water presents “possible health risks to the public” and that PFOA “has been linked to possible health problems related to long-term exposure.”