Who Does Rainwater Belong To?Posted: 4 months ago by funkfrost Collecting Rainwater, It is often an easy way to help out the environment and, in the long run, simply save water. There doesn’t really seem to be any catches to it either. Rain falls from the sky, hits your roof and runs in to your drums or barrels or tanks. If only it were that simple. Comments: 8 Score: [-] 389 [+].