This is the final report for the project "Environmental impact of aquaculture and coexisting industries - scope for comprehensive regulation" - "MILJØREG". The project is funded by the Norwegian Fisheries and Aquaculture Industry's research funding. The main goal of the project has been to prepare a broad overview of the knowledge base related to the environmental impact of aquaculture, as well as environmental impact from other industries with activities in the same areas as aquaculture. Requirements for the regulation of aquaculture were compiled and the scope for a more direct and differentiated regulation of the environmental impact from aquaculture was explored, based on the collected knowledge base. The project has been a collaboration between Akvaplan-niva, the Norwegian Institute for Water Research (NIVA) and Nofima, where NIVA has had the main responsibility for chapter 3, Akvaplan-niva for chapter 4 and Nofima for chapters 5 and 6. However, all institutes have contributed to all chapters.