Rooftop Filters for Rain Water Harvesting

India receives Four lakh crore litres of rainwater every year (4,000 bn M3), but only 8% is harvested. According to the Central Water Commission, this is the lowest in the world. Rainwater that is delivered free of cost on each roof, is a pure and the original source of water. Each habitat has a water resource in the form of borewell, dug well, hand pump, tank or recharge well. A simple step is to connect rooftop rain pipe with Neerain device and the water resource. Such small step would save huge volume of rainwater every year. Say for example with 3000 mm of rainfall, a house in Mumbai with a 1500 square feet roof can save 4 lakh litres of water annually. With 1500 mm of rain in Kolkata, similar area house can save 2 lakh litres of water and with 1000 mm of rain in Bangalore can save 1 Lakh litres of pure, fresh water.

While we capture, filter and store this rainwater in our borewell, we not only save around one lakh rupee worth electricity cost of borewell, but also retain equivalent volume of ground water in the aquifer. This also benefits in improving TDS, Hardness and PH of ground water. In addition, many habitats have common complain of less water during peak summer, storage of rainwater in borewell improves the productivity of borewell. The best is yet to come; imagine if your borewell runs dry and there is no water; the only choice would be to leave the place, will be a scary situation for the family.