Property/Site Owners

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

DNR Shoreland Zoning Contacts by County

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)

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:

Additional MS4 Resources

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

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.

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.