The paper describes the levels of Polycyclic Aromatic Hydrocarbons (PAHs) determined in different environmental matrices of alpine ecosystems: humus, needles, mineral soil, ambient air and bulk deposition. Sample were collected in a monitoring network, which includes 40 remote sites, 7 vertical profiles and 3 high altitude sites, implemented within the framework of the project MONARPOP. Data were arranged in maps aiming at describing the spatial distribution of PAHs in the Alps. Measurements in high altitude sites were used to estimate the long range transport of these pollutants and the rates of bulk deposition in remote areas.