Not sure there's any easy way for a society (as in building society) to do that. There's a huge water tanker on our terrace with a big surface area to capture rain water, it goes through some filtration processes and is utilised by the building for all general purposes. When there is extra water in the tank, it's diverted to the ground water via something opposite of a boring connection. I know that we often have extra water in the tank (it is rainy even as I type this) and it is diverted underground, so in my book that's a success cause something is better than nothing.
