The spatial distribution of the concentrations of sulphur and nitrogen dioxides as indicator pollutants of air was determined on the basis of studies conducted in July and December 2001 within the Pleśna district. The location of passive samplers corresponded with the basic types of land development. The isolines of SO2 and NO2 concentrations were shown on maps. The trends of changes in the seasonal mean concentrations of suspended dust, SO2 and NO2 in a 5-year period (1995-1999) were established using data obtained from the Provincial Disease Control Centre in Tarnów. The results of the research provided the basis for performing quality classification of the district areas according to air pollution levels (maps were drawn) and for identifying the areas suitable for housing development.

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