Within the screening program of 2006 SWECO has had the assignment from theSwedish Environmental Protection Agency to measure the occurrence of WFD prioritySubstances in limnic and coastal surface waters of Sweden. Within this screeningstudy, a number non WFD priority substances were also analyzed; metals (As, Cr, Co,Cu, U, V, Zn, Mo), monobutyltin, dibutyltin, PBDEs (tetraBDE, hexaBDE, decaBDEand nonaBDE) and dioxins (TCDD, TCDF and PCDD)Measurements were made at 95 locations in whole water samples, filtered water samplesand using passive sampling techniques which measures the free (non associated)concentrations. The data set represented a large number of aquatic sites over a broadgeographical range (1800 km from north to south) in different surface water matrices.