192 
and the German Bight. This may be either atmospheric deposition or inputs from the 
rivers Rhine/Schelde or the UK. 
4 5 6 7 8 9 10 11 12 13 14 15 
Figure 40: Endosulfan concentrations [pg/L] in surface water (5 m) in the North Sea (July 2004) and 
Baltic Sea (June 2004) 
In the western Baltic Sea, concentrations were in a similar range as in the German 
Bight. Mainly endosulfan I was detected. Values at most stations ranged from 20 to 30 
pg/L. However, a concentration of 62 pg/L was measured in the Flensburg Fjord. This 
elevated level can be explained by slow water exchange in this bight, and possibly by 
agricultural activities in the area. 
The results of the survey in July 2003, which covered the entire North Sea, were similar 
to those of the German Bight survey. Concentrations in the southern and central North 
Sea tend to be higher than in the northern North Sea. 
In 2004, a few samples were taken in the Greenland Sea - along the 75° latitude - in 
order to investigate possible long-range transports and determine background 
concentrations. No endosulfan above the LOD was detected in these samples. However, 
the LOD was considered too high for such remote areas.