I cut my tap water with RO water. But, sometimes, because of convenience I get water from our local "Kwik Star (Kwik Trip)" store. It says it is treated with "ozonation." I am trying to find some info about what is in it. I have leads of "Hummel Spring" in Liberty Illinois and "Alyeska Bottling." Can't find a report on it anywhere - anyone got anything on it??? Thanks