Municipalities

Port Washington Data Center Proposal

Vantage Data Centers (Vantage) has proposed the construction of a data center campus in the city of Port Washington in Ozaukee County. The proposed Lighthouse campus would be constructed on 672 acres. Vantage owns a total of 1,644 acres. The…

Enviro-Nav (Environmental Responsibility Navigator)

Running a small business requires you to wear many hats - CEO, accountant, environmental manager and more. As a Wisconsin business owner, you may be feeling overwhelmed understanding what rules apply to your facility. To make things easier, the…

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).

Invasive species events & volunteering

Invasive Species EventsYou can find invasive species events and other DNR-hosted events on the DNR Events calendar.

MS4 Audits

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…

DNR Shoreland Zoning Contacts by County

Drain Tile Rules and Regulations

Drain tiles are a common management tool used to improve crop yields and soil conditions and to improve timeliness and accessibility for field operations in areas that are otherwise too wet. Agencies and entities that oversee a variety of drain tile…

Total Maximum Daily Loads (TMDLs) and Impaired Waters

What does the MS4 Permit require for TMDLs and Impaired Waters - Wis Adm Code NR 216.07(10)?Wis Adm Code NR 216.07(10)Every two years, Sections 303(d) and 305(b) of the Clean Water Act (CWA) require states to publish a list of all waters not meeting…

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: