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DNR’s Impaired Lake List
The 1972 Clean Water Act requires states every two years to assess whether their waters meet the national goals of supporting healthy aquatic communities, habitat for wildlife, and opportunities for fishing and swimming. States are required to publish a water quality report and develop an “Impaired Waters List” of lakes and rivers that do not meet the state water quality standards.

The “Impaired Waters List” includes both lakes and rivers and water bodies that make the list must submit plans for maintaining and improving water quality in the watershed. The DNR develops models that set pollution reduction goals, identify sources of pollutants, and recommend best management practices. When monitoring shows the water-body is again meeting water quality standards it is then removed from the list.

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Grass Carp Discoveries Concern Wisconsin Fisheries Officials - The grass carp is an herbivorous freshwater fish which is cultivated in China for food, but deliberately introduced in the United States in 1963 for aquatic weed control. While it is considered an invasive species in the US, it is still stocked in many states as an effective biocontrol for invasive plant species.


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