The Federal Clean Water Act (CWA), Section 303(d) requires total maximum daily loads (TMDLs) to be produced for surface waters that do not meet applicable water quality standards necessary to support their designated uses (i.e., an impaired water). A TMDL determines the maximum amount of a pollutant a receiving waterbody can assimilate while still achieving water quality standards and allocates allowable pollutant loads to various sources needed to meet water quality standards. This TMDL study addresses the impairments in the 1,025-square mile Mississippi River–Sartell Watershed (MRSW) in central Minnesota. These impairments include high levels of Escherichia coli (E. coli) and total phosphorus (TP), affecting aquatic recreation and limited resource value designated uses. Seventeen TMDLs are provided: fifteen E. coli stream TMDLs and two TP lake TMDLs.
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Minnesota Pollution Control Agency (St. Paul, Minnesota)
Minnesota Pollution Control Agency