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The study compares the ash pollen seasons in Szczecin, Drawsko Pomorskie, Bydgoszcz, Zielona Gora, Wroclaw, Opole, Sosnowiec, Cracow, Piotrkow Trybunalski, Warsaw, Lublin, Olsztyn and Bialystok in 2018. The investigations were carried out using the volumetric method. The ash pollen season began between April 7th and April 10th. Maximum daily pollen concentrations were noted earliest on April 10th and latest on April 17th. The greatest risk of allergies caused by the presence of airborne ash pollen was observed in Lublin.