Greywater tower

I found the information interesting. Perhaps someone can use it!
It is so hot here and very little rain in the last three weeks. I wish, I had tried one tower.
But we never know what the weather will be like in the next few weeks, in the south of germany it is nonstop raining.

http://susana.org/lang-en/case-studies?view=ccbktypeitem&type=2&id=90

I just wondered, there are many similar projects in India listed under this organisation
I did not here read about them in the newspaper when i am in india, which is not very ofter.
Does any one of you kow the people, have visited them?