Respiratory diseases are emerging as the major health problem across India and Delhi tops in lung diseaserelated issues. The main reason for such rise in respiratory problems in Delhi is air pollution. Among air pollutants, particulate matter (PM 2.5 ) is very hazardous and it is instrumental in causing lung-related diseases. In this paper, an extreme learning machine (ELM) based on statistically controlled activation weight initialization is used to learn and measure the correlation between PM 2.5 and lung-related problems in Delhi. ELM was trained and tested with PM and lung functionality-related medical data. PM 2.5 level data of different areas of Delhi are collected during January 2016 to December 2016. Lung function-related medical data are collected from reputed hospitals in Delhi and analyzed. Results of sputum sample test and spirometry tests conducted on both adults and school children was collected. The test results for both adults and school children are analyzed, and correlation coefficients are evaluated using linear analysis and Spearman's analysis. The correlation results were positive and thus proving that the increase in lung-related diseases in Delhi is directly related to rising PM 2.5 level in the city.