An appeal of land-based aquaculture is that emissions can be theoretically contained and valorized, but techniques for reusing emissions are constantly changing. In order for the Nordic aquaculture industry to grow in an environmentally sustainable manner, information on the best techniques must be disseminated. That is why the Nordic Council of Ministers, BAT group requested a report on the Best Available Techniques for the reduction and reuse of emissions from land-based aquaculture. The report discusses the current state of Nordic aquaculture, including policy specific to land-based production. The techniques to reduce, reuse, and valorize the major emission types from land-based aquaculture are described in detail. The information within the report is of use to a wide number of stakeholders including operators, policy makers, environmental authorities, investors, and entrepreneurs.