Municipal storm water permits

Important information concerning the DNR’s MS4 General Permits

Effective May 1, 2014, the DNR has issued WPDES MS4 general permits WI–S050075-2 and WI–S050181-1.

Webinar announcement
Informational webinar, November 20, 2014

WPDES MS4 General Permit No. WI–S050181–1: What It Means for Affected Municipalities

Informational webinar, October 9, 2014

WPDES MS4 General Permit No. WI–S050075–2: What Covered Municipalities Need to Know

Storm water pond

Bioswales capture runoff for infiltration (DNR photo)

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 [exit DNR]. 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.

Last revised: Thursday December 11 2014