Superfund Site: MIDVALE SLAG

Superfund Site Profile

In April 2015, EPA, state, and local agency representatives joined business leaders and elected officials and staff at the FLSmidth Plaza in Midvale City to celebrate the removal of the Midvale Slag site from EPA’s Superfund list. EPA deleted the site from the National Priorities List because all required cleanup activity at the site is complete. This marks 20 plus years of collaboration and dedication at the federal, state, and local level to transform a once contaminated land into a thriving development.


The 446-acre Midvale Slag site is located in Midvale City and Murray City, Utah. Five lead and copper smelters operated at the site between 1871 and 1971. Smelter facilities were demolished in the 1970s. Smelting operations contaminated groundwater and soil with heavy metals. Following cleanup, operation and maintenance activities are ongoing.