The Associated Press reports that bottled water provided to about 1,000 southeast Ohio residents whose tap water contained a chemical used by DuPont Company to make Teflon has tested positive for trace amounts of the same substance, the company providing the water said last Thursday. Marietta-based Crystal Spring Water, which has been supplying the water to residents since September, confirmed the presence of perfluorooctanoic acid and its salts in tests after a learning of a similar finding by the local water association, it said. The company''s tests on the bottled water showed C8 levels at 13 to 17 parts per trillion. The well supply that provides the residents'' tap water contained 3,500 parts per trillion to 7,200 parts per trillion. The company is one of three hired by DuPont, the third-largest chemical company in the U.S., to provide water to local residents until it installs filters to remove the chemical at well-water treatment plants near its Parkersburg, West Virginia facility as part of the settlement of a 2001 class action lawsuit against it. Crystal Spring is giving the 1,000 people treated water and is installing a filter to remove the chemical, known as PFOA or C-8, from the spring it uses across the Ohio River in West Virginia, owner Gary Matheny said. It is also sending 2,000 letters to customers to tell them about plans to install the filter. The chemical, used in DuPont products from nonstick cookware coating to computer chips, is a "likely" carcinogenic, according to a draft report by the U.S. Environmental Protection Agency science panel. Ohio and West Virginia residents who sued DuPont in 2001 claimed the company intentionally withheld and misrepresented information about the human health threat posed by the chemical. DuPont, which says C8 poses no human health threat, agreed to pay more than $107 million to settle the lawsuit with the residents over the chemical from the West Virginia plant.