Largest shipwrecks on the Great Lakes Largest shipwrecks on the Great Lakes The Great Lakes are the largest bodies of freshwater in the world. They are five giant freshwater lakes, named Lake Superior, Lake Huron, Lake Michigan, Lake Erie and Lake Ontario. Thousands of vessels have sailed on the lakes from the late 15th century to the present day. Thousands of ships sank on the lakes from 1679 when "LaSalle"'s wooden barque the "Le Griffon" was lost, to the 1975 sinking of the giant freighter "Edmund Fitzgerald" on Lake Superior. Many of these shipwrecks were never found, so the exact number of wrecks will never be
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