Need Help

My LO is six months old. Due to milk allergy she is totally formula fed baby. From beginning I’m using Poland spring bottle water to make her formula without boiling. She doesn’t like warm formula so I give her without warming. She is having reflux since her birth and she is on Pepcid now. But recently someone told me it’s not good to use bottled water to make formula even i cant boiled bottled water to make formula. Now Im totally confused and worried too. Is it really not good ?? Of not then what should I do ?? Please need some advice... TIA