An agreement between Canada and the U.S. that has improved and protected the water quality of the Great Lakes and also improved the lives of millions across the basin celebrated its 50th anniversary recently. On April 15, 1972, the two countries signed a water quality agreement to collaborate on the restoration and protection of the Great Lakes. Under the water quality agreement, the two countries engaged state and provincial governments, municipalities and local authorities, First Nations, Métis and Tribal governments, industry, non-governmental organizations and the public in working together to achieve a healthy and sustainable ecosystem across the lakes for the benefit of present and future generations.