As the debate continues over hydraulic fracturing, or more commonly called "fracking," researchers at Yale University may have complicated matters. Analyzing 64 water samples of groundwater, Yale researchers have confirmed that hydraulic fracturing does not contaminate drinking water. The researcher's findings were published in the journal Proceedings of the National Academy of Science. This disproves an earlier report by the Environmental Protection Agency.

These water samples were collected from private residences in northeastern Pennsylvania. Looking into the water samples, researchers determined that "groundwater contamination was more closely related to surface toxins seeping down into the water than from fracking operations seeping upwards." However, this new research isn't intended to suggest whether hydraulic fracturing is a good or bad thing. It is only a sampling of one region.

Geology across the country is very different. So if you're living over in the New Albany-area shale of Illinois, that might be distinct from living in the Marcellus shale in Pennsylvania." - Desiree Plata, assistant professor of chemical and environmental engineering at Yale University

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