Very high surface phosphate concentrations were measured in the Baltic Proper. Silicate showed enhanced concentrations there though nitrogen compounds were normal. Nutrient concentrations in the Skagerrak and Kattegat were normal or almost normal. In the Baltic Proper oxygen concentrations were below 2 ml/l at depths exceeding 70 to 100 metres. Hydrogen sulphide was found in the Gotland- and Landsort Deeps from 220 metres, and in the western Gotland Basin deeper than 80 to 90 metres.