Dozens of West Virginia residents have filed lawsuits against DuPont for allegedly contaminating drinking water. The new complaints stem from a 2005 class-action settlement of a lawsuit claiming six water systems in Ohio and West Virginia were contaminated by C8. A science panel found links between C8 and six medical ailments including testicular and kidney cancers. Customers of those water systems with any related medical ailments have until the end of January to file suit under the 2005 settlement's terms. Between 500 and 600 more lawsuits are expected.