Study cites methane levels in Pa. water wells near fracking

06/25/2013 | Los Angeles Times (tiered subscription model)

Methane concentrations exceeded average levels in Pennsylvania drinking water wells near sites where hydraulic fracturing is occurring, according to a study from Duke University researchers. About 141 wells were tested in the study. "We need to understand why, in some cases, shale gas extraction contaminates groundwater and how to keep it from happening elsewhere," the report stated.

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