"You have evidence of pig-specific bacteria in surface waters, next to industrial swine operations," says Steve Wing, a researcher at the University of North Carolina.
Hanford workers described symptoms that include chronic headaches, respiratory problems and nerve damage.
Peter Rugh is a Brooklyn-based reporter. He contributes to Vice.com and is a correspondent for WagingNonviolence.org. For examples of recent journalism, visit johnreedstomb.tumblr.com/articles.