HoltraChem Mercury Pollution 

Senior U.S. District Judge Gene Carter last week concurred with a 117-page report filed in January that concluded that mercury downriver from the plant site poses substantial risks to people and wildlife.

Carter also directed a court-appointed research team to conduct additional studies to determine if it’s better to attempt to remove the mercury or to leave it alone and let nature take its course.

The chemical plant was last owned by HoltraChem, which ran it from 1993 until it went out business in 2000. Mallinckrodt Inc., which is based in St. Louis and owned the facility from 1967 to 1982, has been held liable for the pollution because is is the only former owner still in business.