Naghmeh Jafarpournaser - GIS Department, School of Surveying and Geospatial Eng., College of Engineering, University of Tehran, North Kargar Ave., Jalal Al Ahmad Crossing Tehran, Iran,
Mahmoud Reza Delavar - Center of Excellence in Geomatic Eng. in Disaster Management, School of Surveying and Geospatial Eng., College of Engineering, University of Tehran, North Kargar Ave., Jalal Al Ahmad Crossing Tehran, Iran,
Maryam Noroozian - Cognitive Neurology and Neuropsychiatry Division, Department of Psychiatry, Tehran University of Medical Sciences (TUMS) and Roozbeh Hospital, South Kargar Avenue, Tehran, Iran

Previous research has verified that some genes carriers can control the disease to some extent if they avoid prolonged exposure to air pollutants. Annually, a significant number of people lives in Tehran lose their lives due to diseases related to air pollution. According to the measurements of Tehran Air Quality Control Company, particulate matters with a diameter of less than ۲.۵ (PM۲.۵) and ۱۰ microns (PM۱۰) are the most significant air pollutants. These two group of particulate matters are the most important environmental factors affecting cognitive impairment. As recommended by experts, staying away from areas with high levels of these pollutants helps to control the disease process, especially in patients or people at risk. Living in cleaner parts of cities where there have less rates of these pollutants is one of the solutions to prevent cognitive impairment and Alzheimer disease (AD) fast progress. This paper has studied the concentration of these pollutants in Tehran. The best and worst districts polluted areas of Tehran with respect to PM۲.۵ and PM۱۰ which are correlated with cognitive impairment and AD patients are determined.