As for the other options:
- We've done Brita filters but they aren't very feasible for a family of six and I get kind of grossed out at the thought of them getting algae or slimy on the sides.
- Delivered 5 gallon bottles- which are reused every time, so there's no waste: We did this for a few years until I discovered (to my horror) that the bottles have BPA in them. I could have died when I saw that. I read a study that says that girls whose mothers drank from BPA bottles during pregnancy had a more mean and aggressive tendencies. And I, of course, drank it my whole pregnancy with my daughter.
- We've never tried filters attached to the tap. It's a viable option for us to consider.