as long as you're on municipal water there is no need to boil it. the powder doesn't mix well in ice-cold water -- lukewarm tap water works best. remember tap water is what heart surgeons wash their hands in. it's very close to sterile and much more stringently controlled and monitored-- by law-- than bottled water. don't waste your money and don't contribute to growing landfills by buying bottled water except for maybe those times when you need a bottle to travel (even then refillable bottles are cheap and work just as well! ).
do i need to boil the tap water when i make formula for my baby?