Norway's Pollution Control Authority (SFT) called on Monday for tougher regulation of the country's huge fish farming industry, which it says is "the largest source of anthropogenic emissions of nutrients" in coastal areas.
Emissions from a medium-sized farm producing 3120 tonnes of salmon annually is "equivalent to a sewage spill from a city of about 50,000 inhabitants", the agency said in a statement.
Measures proposed by the authority include regular environmental surveys and a "tripartite" system of tougher licensing, monitoring and reporting procedures depending on whether water quality is assessed as "no risk, potential risk or [definite] risk of eutrophication". About 10 per cent of facilities would fall into the latter two categories, according to to SFT's calculations.
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