Delhi is an old town, which has gradually grown into a populous city. It is one of the important business centers of India and thickly populated as well. Since the last decade, drinking water problem has created havoc in the city. In this study, we collected 32 drinking water samples through out Delhi. Different parameters were examined using Indian standards to find out their suitability for drinking purposes. During this examination mainly the physico chemical parameters were taken into consideration.

In urban areas roads surrounded by high rise buildings cause trapping of respirable suspended particulate matter, PM2.5 in the lower regions. Under these situations it is very desirable to know the location of the trapped pollutants in order to find ways to mitigate their health effects. The present study focuses on the identification/prediction of such critical locations using CAL3QHC model.