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Rainwater Harvesting

Laws and Policy

The Central Ground Water Authority (CGWA) has directed Group Housing Societies/Institutions/Schools/Hotels/Industrial establishments/Farm Houses in South and South West Districts and group housing societies located outside notified areas of NCT of Delhi where ground water levels are more than 8 meters below the ground surface to adopt Roof Top Rain Water Harvesting systems in their premises.


A rainwater harvesting system comprises components of various stages - transporting rainwater through pipes or drains, filtration,

Doing Rainwater Harvesting: FAQs

1. What is RWH and why should I do it?  It simply means catching and holding rain where it falls and using it. You can store it in tanks or you can use it to recharge groundwater. Doing RWH has the following benefits: Meet household water needs especially during periods of scarcity. Rainwater is the purest form of water that doesn’t contain impurities like fluoride, arsenic, etc.


How much will it cost to catch rain?When community come together to harvest rain, the per-capita investment goes down. For instance, Panchsheel Park Colony about 1000 residents pooled in Rs 4.5 lakh to harvest more than 170 million litres of water annually.


Components Design Construction   The components of rainwater harvesting systems include:  (1) catchment  (2) conveyance or conduit system  (3) first flush  (4) filters  (5) storage or recharge system    (1) Catchment

2006: The waterloo year

The year 2006 will go down as environment’s watershed year. This is not because this year we have had extraordinary success in environmental management; there was also no environmental disaster per se. This year must be remembered because the task of environmental management has come to be even more contested and even more challenged. Protests against environmental degradation have grown. But so have efforts to deny environmental concerns or to dilute regulations.