In work is presented research of presence Sulfur dioxide (SO2) on sample place where is intensive traffic and population density is high. Air quality monitoring was done with an automatic station. For the interpretation of the results are used monthly and annual patterns. On the basis of the detected pollutants during the air monitoring show the state of environmental conditions in terms of air pollution with Sulfur dioxide and influence of them on aero-pollution, structural materials and building heritage. Also is given evaluation of influence polluted air on building heritage. For statistical data processing and modeling of pollution along with meteorological parameters was used decision tree implementation of the analytical and statistical tool SPSS 17.