Today occupational lung diseases rates as one of the most common work related illness and therefore an issue of great priority in the industrialized countries and also increasingly in the developing countries. Air pollution is one of the most important etiological factor in developing occupational lung disease to those who exposed to it. Today’s urban streets environment is polluted by vehicular exhaust due to poor ventilation and the number of vehicles have increased and manual vehicles (bicycles, carts, tangas etc.) have been replaced by automobiles working on petrol and diesel fuels.

 Materials and methods : The present cross sectional study was done in the context to study the evaluation of lung functions in various occupations attending Respiratory medicine OPD. Different Occupational workers who worked for more than eight years and smokers had higher risks of having chronic respiratory morbidity when compared to those who worked for less than eight years and non smokers. The obstructive lung functions were more common than restrictive functions in workers who worked for more than eight years and smokers. Traffic police and hawkers were the high risk group compared to shopkeepers of having respiratory impairment due to atmospheric pollution in my study.

Results: We studied a total of 300 cases of which 100 were shopkeepers , 100 hawkers and 100 traffic police men. Gender distribution amongst the study population indicates 80.7%was males and 19.3% were females. Out of 300 cases 74 cases (32 traffic police,26 shopkeepers and 25 hawkers) were smokers. PFT parameters like FEV1, FEV, PEFR, FEF 25–75% ,FEV1/FVC values in different population with different occupations were compared in present study.

Conclusion:The study showed that the among different occupational workers who worked for more than eight years and smokers had higher odds of having chronic respiratory morbidity when compared to those worked for less than eight years and non smokers.The obstructive lung functions were more common than restrictive functions in workers who worked for more than eight years and smokers