The recent heavy rainfall that poured in Chennai city due to the depression in the bay of Bengal has done one useful thing, fill up the water table , with the result that the wells in Chennai are full of water now. The rising water table might have been also due to the rain water harvesting being done in numerous structures in Chennai. Where by the rain water is channeled to the well or into the ground through PVC pipes instead of going in waste to the drains which eventually empty into the sea. In our house too the rain water harvesting is being done for the past eight or so years now. During this bout of rainfall I took the opportunity to fill the empty vessels like buckets and tubs with rain water, which is fairly pure and soft, having very little dissolved minerals., from the balcony at the front of our house. Infact we have been using this rain water to wash our clothes for the past two days. I feel that there should be some legislation making it mandatory for any new building constructed to possess the rain water harvesting facility. A good example is the Chennai Metropolitan Bus Terminus, where the rain water is collected in huge under ground tanks. This water is being used to clean the long distance buses that reach the terminus after their long journey.