CHARLESTON, W.Va. (AP) - A new study shows a chemical that spilled into West Virginia's biggest drinking water supply in January could be more toxic than a previous test indicated.

University of South Alabama researcher Andrew Whelton released findings Thursday from crude MCHM toxicity tests on freshwater fleas.

Results indicate it takes much less exposure for the chemical to be toxic to fleas than a 1998 study showed. Eastman Chemical, crude MCHM's manufacturer, conducted the older study.

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