You do loose some of the bacteria, minerals, and trace elements though. But then again, those can be put back in with some ease. The problem comes when, like in

You do loose some of the bacteria, minerals, and trace elements though. But then again, those can be put back in with some ease. The problem comes when, like in Flint, the government decides to do really dumb stuff. I would not put it past some idiotic council to just pump raw sewage back into the water supply to save a dollar.