Shifting Chemistry (IMAGE) Columbia Climate School Caption A study done in northeastern Pennsylvania suggests that drinking water near hydraulic fracturing sites is undergoing chemical changes. Lead author Beizhan Yan checks out a site on a back road. Credit Kevin Krajick/Lamont-Doherty Earth Observatory Usage Restrictions Credit must be given. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.