Where does most of the pollution in the great lakes come from?



  1. 0 Votes

    Pollution of the Great Lakes comes form multiple different sources. There are first of all, over 160 non-native species calling the Great Lakes home, which has thrown off the natural habitat and species interaction web. There is also a huge amount of blame from urban sprawl and the ever increasing development in the area, which can disrupt tributary water systems and deposit waste in the lakes. Another source of pollution is industrial factories which pollute into the air and water. Mercury emissions from coal burning power plants is another source. Most factories and power plants have cleaned up their acts in the last 10 years but there are still lingering effects.

  2. 0 Votes

    Most of the pollution in the Great Lakes comes from industrial discharges, that is, companies dumping pollutants into the water. Corrosive nitric acid and nitrates are the two most-released pollutants into the water. It’s difficult and frustrating to figure out exactly where the pollution is coming from and when, because lots of current legislation allows companies to not reveal their discharges of waste. However, the largest polluters in the United States and Canada have been identified. In the US, it is a U.S. Steel Corporation plant, located in Gary, Indiana. THey have been discharging waste into Lake Michigan. In Canada, an Imperial Oil refinery in Sarnia has been releasing waste into the St. Clair River. Unfortunately, in the 90s, the Great Lakes were believed to be headed back to a state of good health, so extensive monitoring was decreased. But it is now clear that pollution of the Great Lakes is still a major issue, and these polluters must be confronted.

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