Yale researchers have confirmed that hydraulic fracturing – also known as "fracking" – does not contaminate drinking water. The process of extracting natural gas from deep underground wells using water has been given a bad reputation when it comes to the impact it has on water resources but Yale researchers recently disproved this myth in a new study that confirms a previous report by the Environmental Protection Agency (EPA) conducted earlier this year.
After analyzing 64 samples of groundwater collected from private residences in northeastern Pennsylvania, researchers determined that groundwater contamination was more closely related to surface toxins seeping down into the water than from fracking operations seeping upwards. Their findings were recently published in the journal Proceedings of the National Academy of Science.
"We're not trying to say whether it's a bad or good thing," Desiree Plata, an assistant professor of chemical and environmental engineering at Yale University, told News Three in a Skype interview. "We saw there was a correlation between the concentration and the nearest gas well that has had an environmental health and safety violation in the past."
Researchers also noted that shale underlying the Pennsylvania surface did not cause any organic chemicals to seep into groundwater aquifers. However, these findings may not be applicable to all locations worldwide.
"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," Plata explained.
Researchers from Duke University also recently gave people a reason to trust fracking companies. In a study published in Environmental Science & Technology Letters, scientists explained that hydraulic fracturing accounts for less than one percent of water used nationwide for industrial purposes. This suggested that the natural gas extraction processes are far less water-intensive than we previously thought.
It's hoped that these studies will help people better understand the safety of fracking.
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