Bottled water is not recommended to make up infant formula feeds for your baby. This is because it’s not usually sterile and may contain too much salt, (sodium) and sulphate.
If you have to use bottled water to make up a feed, check the label to make sure the water contains:
less than 200 milligrams (mg) a litre of sodium (also written as Na)
no more than 250mg a litre of sulphate (also written as SO or SO4)
You may need to use bottled water to make up a feed if:
your drinking water has been contaminated because of flooding or
travelling abroad and drinking the local water is not recommended though boiling is always recommended.