>But let us allow Jacksona et. al. to speak for themselves, from the report: “We analyzed 141 drinking waterwells across the Appalachian Plateaus physiographic province of northeastern Pennsylvania, examining natural gas concentrations and isotopic signatures with proximity to shale gas wells. Methane was detected in 82% of drinking water samples, with average concentrations six times higher for homes” less than one kilometer from the fracked natural gas wells. […]

“They found that, on average, methane concentrations were six times higher and ethane concentrations were 23 times higher at homes within a kilometer of a shale gas well.  Propane was detected in 10 samples, all of them from homes within a kilometer of drilling. […]

The ethane and propane data are “particularly interesting,” he noted, “since there is no biological source of ethane and propane in the region […]<