Ground based in situ observations of high_vol_sampler at Montseny (ES1778R). These measurements are gathered as a part of the following projects EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: aluminium in pm25 (mass_concentration_of_aluminium_in_pm2p5_in_air), antimony in pm25 (mass_concentration_of_antimony_in_pm2p5_in_air), arsenic in pm25 (mass_concentration_of_arsenic_in_pm2p5_in_air), barium in pm25 (mass_concentration_of_barium_in_pm2p5_in_air), bismuth in pm25 (mass_concentration_of_bismuth_in_pm2p5_in_air), cadmium in pm25 (mass_concentration_of_cadmium_in_pm2p5_in_air), cerium in pm25 (mass_concentration_of_cerium_in_pm2p5_in_air), chromium in pm25 (mass_concentration_of_chromium_in_pm2p5_in_air), cobalt in pm25 (mass_concentration_of_cobalt_in_pm2p5_in_air), copper in pm25 (mass_concentration_of_copper_in_pm2p5_in_air), iron in pm25 (mass_concentration_of_iron_in_pm2p5_in_air), lanthanum in pm25 (mass_concentration_of_lanthanum_in_pm2p5_in_air), lead in pm25 (mass_concentration_of_lead_in_pm2p5_in_air), manganese in pm25 (mass_concentration_of_manganese_in_pm2p5_in_air), nickel in pm25 (mass_concentration_of_nickel_in_pm2p5_in_air), rubidium in pm25 (mass_concentration_of_rubidium_in_pm2p5_in_air), selenium in pm25 (mass_concentration_of_selenium_in_pm2p5_in_air), strontium in pm25 (mass_concentration_of_strontium_in_pm2p5_in_air), thallium in pm25 (mass_concentration_of_thallium_in_pm2p5_in_air), thorium in pm25 (mass_concentration_of_thorium_in_pm2p5_in_air), tin in pm25 (mass_concentration_of_tin_in_pm2p5_in_air), titanium in pm25 (mass_concentration_of_titanium_in_pm2p5_in_air), uranium in pm25 (mass_concentration_of_uranium_in_pm2p5_in_air), vanadium in pm25 (mass_concentration_of_vanadium_in_pm2p5_in_air), zinc in pm25 (mass_concentration_of_zinc_in_pm2p5_in_air)