Regulations
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Landfill operation FAQ
What protections exist for neighbors and the environment if a landfill is built and then starts to leak or cause other serious problems? Landfills operators are required by code to monitor groundwater, surface water and, where appropriate, air…
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Landfill gas emissions
Much of the waste placed in municipal solid waste landfills gets decomposed by bacteria, and this decomposition results in the production of landfill gas. Landfill gas that is not collected can result in landfill gas emissions. General information…
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Landfill manager and operator certification requirements
Landfills in Wisconsin must be run by certified facility managers and site operators. An applicant for facility manager certification must have at least two years of experience operating or being directly responsible for the operation, design,…
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Understanding invasive species
Wisconsin Statute Section 23.22 (1) (c) defines invasive species as "nonindigenous species whose introduction causes or is likely to cause economic or environmental harm or harm to human health." Humans move organisms around all the time.…
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Invasive Species Rule – NR 40 terminology
Prohibited Invasive species that are not currently found in Wisconsin, with the exception of small pioneer stands of terrestrial plants and aquatic species that are isolated to a specific watershed in the state or the Great Lakes, but which,…
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Report invasive species
We are working to keep invasive species out of Wisconsin. Early reports of new populations allow us to respond rapidly and control invasives before they spread into new areas. Select from the tabs below to report invasive species you have found.
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Partners
Please choose a category from the menu below for a listing of related organizations. Please note all links exit the DNR website. Links to publications and other educational resources can be found on our education and publications webpage.
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Purple loosestrife biocontrol — and you
Purple loosestrife (Lythrum salicaria) is a flowering plant that can reach 3’-7’ tall and is listed as a Restricted Invasive Species in Wisconsin because of its history of causing negative ecological impacts to wetlands and shorelines. Extensive…