claim: says there’s no proven instance where hydraulic fracking has polluted groundwater.
author: rick perry
evidence_1: apr 4, 2016 ... scientific american is the essential guide to the most awe-inspiring ... dominic  digiulio has proved that fracking has polluted groundwater in wyoming ... in  2015, epa said in a controversial draft study that hydraulic fracturing has not had  ... there is no evidence that the water quality in domestic wells in the ...
evidence_2: dec 15, 2016 ... "injection of hydraulic fracturing fluids directly into groundwater ... for example,  despite a request from alaska that he not further limit oil and gas ... there has  never been a proven case where chemicals migrated from a ... the issue:  reversing course, e.p.a. says fracking can contaminate drinking water.
evidence_3: jun 4, 2015 ... “hydraulic fracturing is being done safely under the strong ... the epa also said  there was a risk that the process could deplete some water supplies. ... while  burke says the agency “did not find a specific instance where a well went dry or ...  levels, was found in many drinking water wells or in groundwater.
evidence_4: jun 5, 2015 ... the acknowledgment of instances of fracking-related water ... after years of  asserting that hydraulic fracturing has never tainted ... maintained that there was  no evidence fracking had fouled drinking ... have known for years: fracking  pollutes drinking water," said earthworks policy director lauren pagel.
evidence_5: jan 5, 2014 ... over the past 10 years, hydraulic fracturing, or fracking, has led to a boom in ... of  pollution involves methane, not chemicals from the drilling process. ... none of  the six confirmed cases of contamination was related to fracking, bruce said. ...  two instances of drilling affecting water wells were confirmed there ...