As described by the Wisconsin DNR, "A TMDL (Total Maximum Daily Load) is the amount of a pollutant a waterbody can receive and still meet water quality standards".  Section 303(d) of the Federal Clean Water Act requires states to develop TMDLs for impaired waters.  A TMDL is currently being developed for the Upper Fox and Wolf Basins.  These basins converge within a series of pool lakes (Lake Winneconne, Poygan, and Butte des Morts) before flowing into Lake Winnebago.  The LWCD is closely following the TMDL process being conducted by the WI DNR.

Below is an FAQ about TMDLs:

 Total Maximum Daily Load FAQ



Winnebago County is required per NR 216 Wis. Adm Code  to have a Municipal Separate Storm Sewer System (MS4) permit for its urbanized areas.  A "MS4" is defined as a conveyance or system of conveyances including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, constructed channels or storm drains.  Our department conducts annual monitoring, mapping, and reporting for the MS4 permit and is a member of the Northeast Wisconsin Stormwater Consortium.