Sorbicell passive samplers were exposed during 2 months-periods in karst springs, that are supposed to be hydraulically connected with contaminated sites of their watershed. A wide range of organic (chlorinated hydrocarbons, BTEX, PAH, PCB, MTBE, phenolic compounds) and inorganic (metals) chemicals were analyzed. Among them, several (chlorinated hydrocarbons, metals) were measured in very low concentrations in some of the springs. This work highlights the capacity of this type of samplers to detect very low concnetration levels. It shows also the potential impact of contaminated sites over large distances (several km), when located in karst environments where groundwater may flow very rapidly in the fractures and caves network developed in the bedrock. Pilot study supported by the FOEN, completed in 2016 with the Centre d’Hydrogéologie et de Géothermie of the University of Neuchâtel and the consulting office MFR.