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Municipal storm water permits

Important information concerning the MS4 permits

Starting January 2018, online reporting will be available for muncipalities to submit the 2017 Annual Reports due March 31, 2018, and other permit compliance documents. Visit Municipal storm water permit eReporting to learn more.

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 07 2017