What was a result of efforts by the u. s. and canadian governments to improve water quality?

The result of the efforts by the United States and Canadian governments to improve water quality was the GLWQA.

Explanation:

The GLWQA, is also known as the Great Lakes Water Quality Agreement. This agreement was put into place to implement actions and binational priorities that will improve the water quality of the Great Lakes. They help to restore the Great Lakes and protect the waters shared by the United States and Canada.

Explanation:

The Great Lakes water quality agreement was signed between the two countries look up on degrading water quality and prevent any further damage. For this they had to keep, algal growth and excessive amount of phosphorus that was mixed in water, under check .

Excessive Phosphorus and algal growth can affect the wildlife and aquatic life of the region. The nutrient levels and the Phosphorus levels where balanced to revamp the lakes from already damages done.