Ground based in situ observations of wet_only_sampler at Westerland (DE0001R). These measurements are gathered as a part of the following projects CAMP, EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: HCB in precip (mass_concentration_of_hexachlorobenzene_in_precipitation), PCB_28 in precip (mass_concentration_of_polychlorinated_biphenyl_28_in_precipitation), PCB_52 in precip (mass_concentration_of_polychlorinated_biphenyl_52_in_precipitation), alpha_HCH in precip (mass_concentration_of_alpha_hexachlorocyclohexane_in_precipitation), benz_a_anthracene in precip (mass_concentration_of_benz_a_anthracene_in_precipitation), benzo_a_pyrene in precip (mass_concentration_of_benzo_a_pyrene_in_precipitation), benzo_bjk_fluoranthenes in precip (mass_concentration_of_benzo_bjk_fluoranthenes_in_precipitation), benzo_ghi_perylene in precip (mass_concentration_of_benzo_ghi_perylene_in_precipitation), chrysene_triphenylene in precip (mass_concentration_of_chrysene_triphenylene_in_precipitation), dibenzo_ah_anthracene in precip (mass_concentration_of_dibenzo_ah_anthracene_in_precipitation), dieldrin in precip (mass_concentration_of_dieldrin_in_precipitation), fluoranthene in precip (mass_concentration_of_fluoranthene_in_precipitation), gamma_HCH in precip (mass_concentration_of_gamma_hexachlorocyclohexane_in_precipitation), inden_123cd_pyrene in precip (mass_concentration_of_inden_123cd_pyrene_in_precipitation), pp_DDE in precip (mass_concentration_of_pp_dichlorodiphenyldichloroethylene_in_precipitation), pp_DDT in precip (mass_concentration_of_pp_dichlorodiphenyltrichloroethane_in_precipitation), pyrene in precip (mass_concentration_of_pyrene_in_precipitation)