Our tap water is disgusting. What we've been doing is using a large PUR filter container that stays in the refrigerator. We fill the top with water and it filters down. It has a little spigot dispenser, from which we fill our Sigg and Klean Kanteen bottles. We have another small filter container that we keep on the counter and use for making ice cubes, tea, etc. I'm concerned about the safety of the plastic, but haven't yet looked into filters for the sink itself.
Would have to buy that new.....hmmm....and the filters.