Of course i have absolutely no idea of the real situation, but why the Palar river isn't usable? Of course water from there will require proper treatment/cleaning, but still? Not trying to argue, ofc you know what you are talking about, just to get a piece of education.
Let me guess, there are bacteria in it's water which are too hard to filter out/kill?
Let me guess, there are bacteria in it's water which are too hard to filter out/kill?