Hi Tatiana, Reverse osmosis water is not good for drinking, "World Health Organization Issues Reverse Osmosis Water Warning. Just about everyone knows that Reverse Osmosis (RO) systems excel at removing water impurities, but few are aware that they also remove the beneficial minerals. In fact, the reverse osmosis process removes 92-99% of beneficial calcium and magnesium." It's better to collect rain water, connect a tank to your gutter down pipe, keep the gutters clean and place a grate on the down pipe to prevent rodents from falling into the tank.