By Maddy Lauria Grist Contributing Writer This story was originally published by Grist. Sign up for Grist’s weekly newsletter here. When Trish Leigey’s taps started running brown and foul in late 2019, she had an uneasy suspicion about what was tainting the once-clear mountain water. Tests later confirmed her hunch. Bovine DNA had infiltrated drinking water supplies in rural Loganton, Pennsylvania — contamination her lawyers linked to Nicholas M…