Fracking Poses Potential Risks to Drinking Water Supplies

Fracking has not led to widespread, systematic pollution of drinking water, the Environmental Protection Agency (EPA) will say on Thursday in a long-awaited study, sources who have seen the assessment said.
The study, five years in the making, found some drinking water vulnerabilities to hydraulic fracturing, such as where supplies were scarce, but overall saw little impact from the drilling technique.
In its review of data sources “available to the agency”, the EPA found specific instances where fracking affected water sources but found that they were small relative to the overall number of fracking sites around the US.