Kathy Whyte WNBF News photo

The U.S. Department of Energy has completed a study into the impact of hydraulic fracture drilling for natural gas in Western Pennsylvania on nearby drinking water aquifers.

The study shows no evidence that chemicals from fracking migrated into the water source.  Researchers said the chemical-laced fluids that release gas trapped in rock formations far underground stayed thousands of feet below drinking water.

A Duke University scientist said the preliminary results are importation.  Rob Jackson, however, said the findings don't necessarily prove that fracking can't pollute drinking water.