Аннотация:This study was collected from seven samples of urbanized areas of Ulaanbaatar city. We were analyzed
content of nitrogen; organic component and pH of soil that gas station. The samples were collected from 5 to 20 cm range, from pollution soils by petroleum products. The sharp deterioration of the nitrogen regime and the transformation of the soil buffering capacity in the area of influence of gas station may explain in petroleum retention levels (a long time). Acid base properties of soils increased to process of pollution in the soils. The fixed pH of soil around petrol stations is characterized by increased alkaline properties.