Total Maximum Daily Loads (TMDLs) are EPA approved amounts of pollutant loading that can occur and have a water body meet water quality standards. This page is collection of links and resources to better understand, and meet, TMDL requirements.
Confluence of the St. Croix and Mississippi rivers. Note the St. Croix River is not impaired for sediment, while the Mississippi River is impaired.
TMDL MS4 permit guidance
TMDL toolkit for MS4 permit compliance
TMDL guidance and general information
Information received from MS4 permittees
Links and other resources