If you really want to provide awesome water, look into an ecoquest water purification system. It uses UV light, ozone, .05 miron solid carbon filter. Basically it removes any contaminants you can find in water, removes chlorine, bacteria and virus, copper and lead etc...countertop unit or they do have a whole house system.
Cost of unit is a bit expensive, at around $400 for countertop, and around 3k for whole house, but so worth it, especially if you are on a well like me. I wouldn't drink any water from any city or well without this level of filtration let alone put it in my tank.