Nitrogen dioxide (NO2 ) is one of the most poisons that influencing the quality of life and human wellbeing. Generally, the impacts of NO2 presentation depending on concentration, term of introduction and anthropometric factors. This study pointed to analyzing the NO2 concentration of surrounding discuss and to evaluating human wellbeing dangers in genuine time and lifetime introduction. A discuss contamination wellbeing chance evaluation (AP-HRA) gauges the wellbeing affect to be anticipated from measures that influence discuss quality, totally different financial, natural, and arrangement circumstances. As such, it is an vital device for educating open approach choices. This archive presents the concept of AP-HRA, depicts in wide terms how the wellbeing dangers of open air discuss contamination and its sources are estimated, and gives an overview of the common standards for the correct conduct of an AP-HRA for various scenarios and purposes.