Nutrient concentrations were normal for the season in all areas. At the coastal station Släggö, in the Skagerrak, the bottom water oxygen concentration was less than 2 ml/l. This was worse than normal. From 70-90 metres in the Bornholm Deep (BY 5), the Norrköping Deep (BY 32) and in the eastern Baltic the oxygen concentrations were lower than 2 ml/l. Hydrogen sulphide was established at the Fårö Deep (BY 20) and in the western Baltic (BY 32).