"Lisa",having been responsible for very large,hospital/industrial water systems,both here,and in the USA,I say,"Don't Bother".
The filters WILL become sources of contamination.In the hospitals,we had the means to do nearly immediate checking of the water's bacteria counts,metals,"other".In a home setting you don't.As has been said,even the bottled water is suspect."Home filters" don't hurt anything,as long as they are VERY well maintained/filters changed very often.They can remove some sedament,thatsgood.
"Home Systems","To much "Squeeze",for not enough "JUICE"!!
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Thanks, CC. So basically the best way to protect the family is bottled water, boiled and filtered using brita? What about bathing and brushing teeth? What if your kids swallow the water by mistake?