Ground based in situ observations of high_vol_sampler at Víznar (ES0007R). 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: ammonium in pm10 (mass_concentration_of_ammonium_in_pm10_in_air), ammonium in pm25 (mass_concentration_of_ammonium_in_pm2p5_in_air), chloride in pm10 (mass_concentration_of_chloride_in_pm10_in_air), chloride in pm25 (mass_concentration_of_chloride_in_pm2p5_in_air), nitrate in pm25 (mass_concentration_of_nitrate_in_pm2p5_in_air), sulphate_total in pm25 (mass_concentration_of_sulphate_total_in_pm2p5_in_air)