HOUGHTON, Mich. — The U.S. Environmental Protection Agency has announced the completion of the cleanup at a toxic waste site in Michigan's Upper Peninsula once listed as among the nation's greatest pollution threats.

EPA regional Administrator Susan Hedman said Thursday that the Quincy Smelter portion of the Torch Lake Superfund site has been removed from the national priorities list.

Hedman and others made the announcement in Houghton, across the Portage River from the former smelter in Houghton County's Franklin Township.

The federal government placed Torch Lake on the Superfund list in 1986. The EPA says about 200 million tons of mine tailings were dumped in the area during copper milling and smelting operations in 1868-1968.