On behalf of the Norwegian Environment Agency, NILU - Norwegian Institute for Air Research in collaboration with NINA – Norwegian Institute for Nature Research analysed biological samples from terrestrial urban regions for various inorganic and organic contaminants. Stable isotope analysis for nitrogen and carbon was carried out by the Institute for Energy Technology (IFE). Sample collection was carried out by the Norwegian Institute for Nature Research (NINA) and others. The purpose of this report is to provide an updated assessment of pollution present within the terrestrial urban environment in Norway. In the case of earthworms, urban sites were compared with reference sites.Eggs of the terrestrial bird species golden eagle and pied flycatcher as well as liver from urban brown rats and urban and rural earthworms were investigated in this study.