'In 2012, Canada and the United States reaffirmed their joint commitment to protect the lakes through a renewed Great Lakes Water Quality Agreement. Since signing of the renewed agreement, the Governments of Canada and the United States have worked to implement its provisions in cooperation and consultation with state and provincial governments, tribal governments, First Nations, Métis, municipal governments, watershed management agencies, local public agencies, and the public. The Progress Report of the Parties is issued every three years to report on achievements in restoring and protecting Great Lakes water quality and ecosystem health. A great deal has been accomplished since the issuance of the last Progress Report in 2016'--Executive Summary, page iv.