My husband works for a water plant, and any time I buy bottled water he "freaks", most bottled water is just tap water & "most" municipalities have more stringent regulations on the water they produce than the bottled water companies. The plant he works at tests their water every hour, which is far more often than the bottled water places.
At our home we have Brita pitchers, so we filter our tap water & thats what we all drink.
Desiree
