Remember when the EPA determined that fracking did pollute water supplies in Pavilion, Wyoming—and then independent analysis confirmed the EPA's findings? Well, the US Geological Survey has done its own tests, largely confirming what the EPA found.
Bloomberg quotes Duke University's Rob Jackson:
At a quick glance, these results appear consistent with the earlier EPA study. The stray gas concentrations are very high, not only for methane but especially for ethane and propane. That combination suggest a fossil fuel source for the gases.
Residents of Pavilion currently are advised against cooking or drinking with their well water.
Canadian energy company Encana, which operates fracking wells in the area, says any contaminants found in water are naturally occurring.