Environmental pollutants in large Norwegian lakes, 2014

Summary

We report here on the presence of contaminants in the pelagic food chains in the lakes Mjøsa, Randsfjorden and Femunden and in supplementary material of fish from Tyrifjorden and Vansjø, sampled in 2014. Mercury and persistent organic pollutants (cVMS, PCBs, PBDEs, PFAS, S/MCCP) were analyzed in samples of fish from all lakes, as well as zooplankton in Mjøsa and Randsfjorden. Among the key findings are that the siloxane D5 shows trophic magnification in Mjøsa and Randsfjorden and that PFTrA is the dominating PFAS in liver samples of fish.