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Background
The Lower Fox River, located in northeastern Wisconsin, begins at the Menasha and Neenah channels leading from Lake Winnebago and flows northeast for 39 miles where it discharges into Green Bay and Lake Michigan. Approximately 270,000 people live in the communities along the river. The river has 12 dams and includes the highest concentration of pulp and paper mills in the world. During the 1950s and 1960s, these mills routinely used PCBs in their operations which ultimately contaminated the river.
PCBs do not degrade naturally, but instead concentrate in the environment and the food chain resulting in health hazards to humans, fish and wildlife. The Lower Fox River project involves the cleanup of sediment (mud) contaminated with PCBs, as well as the restoration of the natural resources damaged by these contaminants.
A number of federal, state and tribal agencies have joined efforts to address this important issue through regulatory avenues including Superfund, the Natural Resource Damage Assessment, and state spill authorities.
What are PCBs?
As a result of the recycling of PCB-containing carbonless copy paper, area mill operations discharged PCBs in waste streams, contaminating sediment in the Lower Fox River. The Lower Fox River is the largest source of PCBs to Lake Michigan in the basin. From 1957 to 1971, about 250,000 pounds of PCBs were released, contaminating 11 million tons of sediment. It is estimated that some 160,000 pounds of PCBs have already left the Fox River and entered Green Bay and Lake Michigan. On average, 300 to 500 additional pounds are flushed from the Lower Fox sediment each year. Floods would flush additional thousands of pounds into Green Bay. Once PCBs are released into the bay and Lake Michigan, they are extremely difficult, if not impossible, to recover.