The Fox River/Green Bay Cleanup Project
The Lower Fox River and Green Bay areas experienced both the good and bad sides of economic development. Once described as "the hardest working river in the world" because of the amount of industry that used the waterway, the Fox River now shows the results of past discharges of municipal and industrial byproducts.
Between about 1954 and 1971, paper companies using polychlorinated biphenyls (PCBs) to make carbonless copy paper discharged nearly 700,000 pounds of these chemicals into the Fox River. The dangers posed by PCBs were unknown until the early ´70s, but their use and discharge into the environment were outlawed by federal environmental regulations in 1976. The ban was successful, but because PCBs bind to dirt and break down very slowly, they are still found today in the sediment of the Lower Fox River and Green Bay.
Since the 1970s there have been significant improvements in the water quality in this system. This has resulted in the restoration of a diverse fishery, including a world-class walleye fishery. However, levels of PCBs (and mercury) in fish are still high enough that consumption advisories for most species are needed to protect human health.
For More Information from the Wisconsin DNR Site
exotic invasive species information
Exotic species are plants or animals that enter an ecosystem from beyond their native ranges.
Exotics are sometimes called "invasive" species because they tend to take over new habitats. That's because natural predators aren't present outside the exotics' normal range. Native species aren't adapted to exotics, and lack the ability to compete. The population explosion that results can upset the ecological balance of aquatic or terrestrial habitats. Once established, exotics are nearly impossible to eliminate.