Rain water harvesting- Why is it essential?

Owing to scores of reasons such as massive urbanization, increasing construction, huge industrialization etc, water shortage is highly being experienced. Thus, various methods are being adopted to conserve water. Rain water harvesting is one such method which is gaining great popularity among people as it is a hassle-free job. To collect rainwater all you need to do is to build a storage area for rainwater and then with the use of filters or purifiers enhance water quality for drinking purposes. This way apart from trimming down your water bills rain water harvesting also proves to be a great boon at emergency situations like a natural calamity, disasters etc.