Berkeley Pit Superfund Site Forms Largest Body Of Contaminated Water In U.S.

BUTTE, MT - JULY 06: A view of the skyline in downtown Butte on July 6, 2017 in Butte, Montana. Butte is home to the toxic Berkeley Pit. Formerly an open pit copper mine, today the Berkeley Pit is part of the largest Superfund site in the United States. In its heyday, in the 1860s, the Butte area was known as the "Richest Hill on Earth" due to the bonanza in copper and other metals. (Photo by Janie Osborne/Getty Images)