Scoping of Air Pollution in Tehran(1999 -2007)

Air Pollution of cities has nowadays turned into an environmental, social problem.Population growth, asymmetric development in which scientific principles are notalways observed, physical tissue of cities, increase in tools,and polluting resourceshave jeopardized human life in some cities, there by threatening their health.As the largest city of Iran , Tehran is among the most polluted cities throughout theworld. In view of the effects caused by air pollution to the environment and humanhealth, precise identifying of pollutants and specifying of polluted scopes in order tolessen pollution are necessitated.In this research, data pertaining to carbon monoxide (Co) were extracted from 10main stations for measuring the air pollution settled by Tehran Clean Air Control Co.based on the PSI index and were specified by means of Excel software for a 10 –yearstatistic period of clean and dirty air, and 5 samples of the most serious polluted dayswere selected to be studied. Then, for scoping, some maps were provided by GIS.Investigation of the maps drawn revealed that direction and pace of wind played amajor role in movement of air pollution. Highly unhealthy scopes were observed incentral and southern areas, such as Fatemi, Bazar, Azadi, Mehrabad and Bahmanstations. In the samples studied, clean and permitted scopes existed more in northern,northwestern, and northeastern parts except for the sample of the day 04/12/2005,when no clean air existed anywhere in the city.