Superfund Site Profile
The Onalaska Municipal Landfill site is located in Onalaska, Wisconsin. It consists of a 7-acre landfill on an 11-acre parcel next to the Black River. The landfill area was formerly a sand and gravel quarry. From 1969 to 1980, the town of Onalaska operated the landfill, which accepted municipal and industrial wastes. Facility operations contaminated groundwater with hazardous chemicals.
The cleanup, which consisted of a landfill cover, groundwater pump and treat system, and a bioremediation system, was completed in 1994. The bioremediation system was shut down in 1998 and the groundwater system was discontinued in 2001. The Wisconsin Department of Natural Resources assumed control of the site in 2002.