The paper presents the results of a study of micro-sized pollution of the atmosphere of the urban settlement Posyet caused by a coal terminal. It was shown that PM10 particles (under 10 μm) in fractions from 21.94 to 45.5% were found at all 20 sampling points in Posyet. It can be noted that, regardless of the distance from the terminal, a single profile of atmospheric particulates with a peak in hazardous micro-sized dimension range is observed at all points of the settlement, which indicates a pronounced negative effect of the open coal terminal on the air in the settlement. The prognosis for bronchopulmonary diseases in the urban settlement Posyet with the current dynamics of coal handling is negative.