Abstract
ABSTRACTHigh levels of air pollutants in the Tehran city are a serious threat to the citizens' health, which are also occupying the city authorities' minds in the recent years. In this research, our attempt is to identify the highly polluted districts among the 22, which are exposed to widespread toxic gases, and to evaluate their distributive effects on the population density in the same districts. The studied pollutants were CO, O3, NO2, SO2, and PM2.5. The pollutant content data was collected from pollution-measuring stations. The main pollutant is CO, changing into suspended particles of PM2.5. Comparisons made between the maps produced on the pollution density levels and population densities in the five districts of 2, 6, 10, 11, and 12 at the center of Tehran indicated higher pollution. District 10, due to its worn-out texture and with a high population density of 37,504 p/hectare was the the most critical one. Districts 2 and 6, with lower population densities, were placed in second and third rank. In general, the central districts were more polluted, corresponding to higher population densities.
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