Municipal storm water permits
NR 216 Rule Updates:
Chapter NR 216, Wis. Admin. Code, Storm Water Discharge Permits was last updated in 2003. Since that time there have been changes to state statutes, federal requirements, and Chapter NR 151, Wis. Admin. Code that need to be reflected in administrative code. A public hearing on the proposed rule updates is scheduled for April 20, 2021 at 1:00 p.m. via Zoom. Comments on the proposed rule must be received on or before April 30, 2021. View meeting notice and draft rule at:
Reminders for MS4 Permittees
- General permittees and Madison area permitees shall update and submit their storm water management programs to the department by March 31, 2021.
- 2020 MS4 Annual Report now available.
Learn more at MS4 eReporting.
More than two hundred municipalities in Wisconsin that include cities, villages, towns and counties within urbanized areas are required to have Municipal Separate Storm Sewer System (MS4) permits under NR 216, Wis. Adm. Code. Use the links below to find out who is affected, how municipalities comply with permit requirements, and technical assistance documents. Learn more about storm water runoff.
- Permit overview
Municipal permit program information
- Find permit information
Look up municipal permittees
- Publications/technical guidance
Obtain technical guidance on storm water management planning and practices, and find guidance on grass swales and rain gardens
Find information on technical standards for management practices, SLAMM model, P8 Model, MS4 modeling guidance and West Nile Virus concerns with storm water management
View presentations from past workshops on municipal storm water management
Learn about grants to municipalities for planning and constructing storm water projects and download application materials
- MS4 eReporting
Municipal permittees are required to submit an annual/biennial reports and permit compliance documents to the DNR to document progress and compliance with the permit requirements.
- Whose Pond is it Anyway?