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External Services

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    Environmental Review Public Notices

    The Environmental Loans Section welcomes public input on the environmental reviews and potential environmental impacts of water infrastructure projects seeking funding through the Safe Drinking Water Loan Program (SDWLP).

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    MS4 Audits

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    Waterway and Wetland Projects on Public Notice

    Public notices are required by statute to alert interested members of the public of the DNR's intention to authorize a Wisconsin Waterway or Wetland individual permit. The public notice for an individual permit application is posted here for 60 days…

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    Fincantieri ACE Marine

    Fincantieri ACE Marine (FAM) is a premier shipbuilding and manufacturing company based in Green Bay, Wisconsin. Established as a subsidiary of Fincantieri Marine Group, a global leader in shipbuilding and marine engineering, FAM specializes in…

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    Individual and General MS4 Permits

    In the state of Wisconsin, there are a total of 245 municipal separate storm sewer system (MS4) permittees (last updated June 2024). Of the 245 MS4 Permittees, each region has the following:

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    Additional MS4 Resources

    Resources to different storm water funding opprotunities, past quarterly regional newsletters and common MS4 questions asked by MS4 Permittees.

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    Underserved Drinking Water System Grant Program

    ATTENTION: Small public drinking water systems with active violations (e.g. MCLs, TTs) or active action level exceedances (e.g. lead ALEs) may receive funding to help the systems return to compliance with the Safe Drinking Water Act.

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    Storm Water Management Programs

    The MS4 BMP menu is intended solely as a tool and does not contain any mandatory requirements, except where requirements found in statute or administrative rules are referenced.

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    MS4 Best Management Practices Menu

    The Wisconsin Department of Natural Resources (DNR) developed the MS4 BMP menu to assist MS4 Permittees in complying with their MS4 Permit. The menu provides resources and examples that may help permittees choose appropriate stormwater strategies.…

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