The present study was designed to evaluate the variation of biochemical characteristics and air pollution tolerance index (APTI) of 15 selected tree species growing at industrial, residential and campus sites of Rohtak City, Haryana, and North India. So as to evaluate the susceptibility level of plants to air pollutants five parameters namely leaf extract pH, relative water content, ascorbic acid, chlorophyll and proline were determined and synchronized together to laying down the air pollution tolerance index (APTI) of fifteen frequently grown tree species around Rohtak city, Haryana. In the present study, the air pollution tolerance index (APTI) of many tree species has been systematized by analyzing important biochemical parameters. The anticipated performance index of F.virens and E.obliqua tree species was also calculated by considering their APTI values together with other socio-economic and biological parameters. Based on these two indices, the most suitable tree species are F.virens and E.obliqua in green belt areas are identified and recommended for long term air pollution management
