Great Lakes region Great Lakes region The Great Lakes region of North America is a bi-national Canada-American region that includes portions of the eight U.S. states of Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania and Wisconsin as well as the Canadian province of Ontario. The region centers on the Great Lakes and forms a distinctive historical, economic, and cultural identity. A portion of the region also encompasses the Great Lakes Megalopolis. The Great Lakes Commission, authorized by the region's American states and Province of Ontario, and the additional Canadian Province of Quebec, comprises a bi-national authority with specified powers to protect and
Great Lakes "Since the early 1970s, the level of treatment to reduce pollution from waste water discharges to the Great Lakes has improved considerably. This is a result of significant expenditures to date on both infrastructure and technology, and robust regulatory systems that have proven to be, on the whole, quite effective." The commission reported that all urban sewage treatment systems on the U.S. side of the lakes had implemented secondary treatment, as had all on the Canadian side except for five small systems. However contrary to federal laws in both countries, those treatment system upgrades have not yet eliminated Combined sewer