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 Meat and its practice of spreading liquefied animal waste on nearby fields. That may not have surprised many of Leigey’s neighbors. …