EPA: Pollution from mine spill much worse than feared www.azcentral.com/story/news/nation/2015/08/09/navajo-nation-epa-spill/31384515/?hootPostID=['ee0d3ee5ccd0dcd8d9054cfce6213ccc'] FARMINGTON, N.M. - Officials from the Environmental Protection Agency said Sunday that the Gold King Mine discharged an estimated 3 million gallons of contaminated water, three times the amount previously believed.