By Laura Arenschield, The Columbus Dispatch

A federal judge has ruled there is enough evidence that chemicals from a DuPont Teflon plant contaminated a drinking-water supply in southeastern Ohio for the matter to go to trial.

The ruling by U.S. District Court Judge Algenon L. Marbley, issued on Tuesday, answers some fundamental environmental questions about DuPont’s responsibility for chemical pollution in well fields run by the Little Hocking Water Association.

Specifically, it means DuPont could be financially responsible for cleaning up the aquifer even though the company has for years filtered the water to make it usable.

The Little Hocking Water Association is a nonprofit group in Washington County that serves about 12,000 residents and has wells across the Ohio River from DuPont’s plant in West Virginia.

The association sued DuPont after realizing its well fields were tainted with C-8, a chemical classified by the U.S. EPA as a “likely carcinogen.”

A 2009 study of people near the plant who were exposed to the chemical suggested that C-8 could harm their immune system and cause birth defects…

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