Rainwater Harvesting

Rainwater harvesting is an option which has been adopted in many areas of the world where conventional water supply systems have failed to meet the needs of the people. Examples of RWH systems can be found in all the great civilisations throughout history.

Here's an eToolkit on rainwater harvesting that tells you all that you need to know to harvest rain successfully.

The http://rainwaterharvesting.org site has a map of Delhi showing geology, water level, water quality and giving recommendations for rainwater harvesting in different areas.

View the map here: http://www.rainwaterharvesting.org/index_files/intro_map.htm

The information may be out of date.

Image source: http://rainwaterharvesting.org