In this paper a simple conceptual model is introduced in order to predict the atmospheric pollen concentration threshold above which pollinotics show allergic symptoms. In addition, the range of the pollen sampler with respect to the local and remote emission of pollen grains, produced by the vegetation in its flowering phase, is highlighted. Two different pollen types have been considered; their emission in the atmosphere takes place in two periods of the year, which greatly differ both in climatological respect and concerning the atmospheric of mixing particles. The data analysis is carried using a methodological approach, taking into account phenological, aerobiological and meteorological parameters.