The document provides an overview of Canadian policies for the protection of Ontario's freshwater ecosystems. It discusses the Canadian Environmental Protection Act (CEPA), Ontario's Clean Water Act, Ontario's Fisheries Act, and the Code of Practice by Environment and Climate Change Canada (ECCC). The policies aim to address road salt pollution, which poses a significant risk to aquatic life and water quality. The document highlights the strengths and weaknesses of each policy and guideline, and emphasizes the need for a collaborative approach to address the challenge of road salt pollution.