To conserve fish and their habitat and human health from harmful substances from pulp and paper mills, the government of Canada has introduced Pulp and Paper Effluent Regulations that were created under the Fisheries Act in 1971 in Canada to control deposits of harmful substances in water frequented by fish. Today, in this article, we will learn about these regulations. To improve water quality, conserve fish, fish habitat, and fisheries resources’ usage, the government of Canada has designed Pulp and Paper Effluent Regulations (PPER). Elements of Pulp and Paper Effluent Regulations: The regulations put a limit on the suspended solids and maximum quantities of biochemical oxygen that can be deposited by pulp and paper mills into water frequented by fish under prescribed conditions. The regulations prohibit any effluent deposits which can be acutely deadly to fish. To identify effluents impacts on fish and fish habitats, these regulations include requirements for mills to host environmental effects monitoring.