Bangalore is state capital of Karnataka, India and also knows as IT capital of India. In 1975, total number of lakes in Bangalore was 51 which had reduced down to 17 now because of population growth, land encroachment and water pollution. Earlier they were a good source of daily use water but now due to extensive pollution, it cannot be used. A new system is proposed based on Low power WSN clubbed with cloud infrastructure to monitor water quality in the lakes in real time during different seasons in a year and see the variation of water quality in different region i.e., close to human infra, in middle of lake, during rainy season etc.. Basic plan is to conduct this experiment simultaneously across the 17 lakes in Bangalore. With the data collected, suitable measures can be suggested to government to take effective actions in order to save the exiting bio-diversity across the lakes. Cloud infrastructure can be useful to see and analyze real time data from anywhere and even archive data which can be further downloaded to see variation in last few years. Similar approach can be implemented to measure real time air quality in Bangalore and some of other major polluted cities like Delhi.