EPA Superfund sites

Superfund sites are designated as being among the nation's worst areas with respect to toxic and hazardous waste. The Environmental Protection Agency is the federal agency that determines if a particular site is hazardous, prepares a course of action to reduce the hazard, and finds the parties responsible for the pollution. If a site is listed with the Superfund program, federal dollars are available for cleanup.[90]
The Kennecott South Zone/Bingham site contains contamination from Kennecott Copper Mine's operation in Copperton, at the base of the Oquirrh Mountains to Bingham Creek and Butterfield Creek. A 72-square-mile (190 km2) plume of lead, arsenic and sulfates (covering 9 percent of the watershed) currently contaminates the ground water from the mine site all the way to the Jordan River. The largest inland reverse osmosis plant in the country was built in 2006 to clean up the ground water and a second plant has been scheduled for construction; completion of the ground water cleanup, however, is not projected until 2040. In 1998, the site was removed from the Superfund list due to Kennecott's progress in the cleanup and a consent decree legally obligating Kennecott to continue the rest of the cleanup.[91][92]


The river next to capped tailings from the Sharon Steel Superfund site
The Murray Smelter site was the location of a large lead smelter in operation from 1872 until 1949. The 142-acre (57 ha) site contained groundwater contamination from arsenic and lead, but the majority of the cleanup was completed in 2001.[93]
In Midvale, there are two Superfund sites that sit along 4 percent of the Jordan River. The Midvale Slag site is a 446-acre (180 ha) site adjacent to 6,800 feet (2,100 m) of the Jordan River. From 1871 to 1958, the site contained five separate smelters that processed ores from Kennecott and other mines. The site was contaminated with lead, arsenic, chromium, and cadmium. Cleanup of the property is complete, although the Jordan River Riparian Project still underway as of 2010.[94][95] Sharon Steel was a 460-acre (190 ha) site adjacent to 4,500 feet (1,400 m) of the Jordan River which was used, from 1902 to 1971, for smelting copper from Kennecott Copper Mine. The site was contaminated with lead, arsenic, iron, manganese, and zinc. Cleanup has been completed, and the site taken off the Superfund list in 2004.[96]


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