EPA’s late changes to fracking study downplayed risk of polluted drinking water

Top officials of the U.S. Environmental Protection Agency last year made critical changes at the eleventh hour to a highly anticipated, five-year scientific study of hydraulic fracturing’s effect on the nation’s drinking water. The changes, later criticized by scientists for lacking evidence, played down the risk of pollution that can result from the well-drilling technique known as fracking.

Documents obtained by APM Reports and Marketplace show that in the six weeks before the study’s public release, officials inserted a key phrase into the executive summary that said researchers did not find evidence of “widespread systemic impacts” of fracking by the oil and gas industry on the nation’s drinking water.

Earlier draft versions emphasized more directly that fracking has contaminated drinking water in some places.

The documents also show that the news release accompanying the scientific study was changed on June 3, 2015, the day before it was made public. A draft displayed a conclusion that the EPA had identified “potential vulnerabilities” to drinking water.

Some of the agency’s own scientists criticized the changes and rebuked the key conclusion, APM and Marketplace reported.

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