Ground based in situ observations of bulk_sampler at Tustervatn (NO0015R). These measurements are gathered as a part of the following projects EMEP, NILU and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ammonium in precip (mass_concentration_of_ammonium_in_precipitation), ammonium in precip (mass_concentration_of_ammonium_in_precipitation), chloride in precip (mass_concentration_of_chloride_in_precipitation)