Impaired Waterbodies of Wisconsin.

The US EPA has a website that has a searchable database to look up different water bodies in the state of Wisconsin.

The database includes the TMDL (total maximum daily load) for a given material into a waterbody.  Some streams and rivers are impaired due to too much of something entering the system.

Mercury TMDLs are being developed.   Fish advisories are in place.

In our neck of the woods the St. Louis River is the main body of water of concern.