Unless a fresh water tank is not properly maintained, water that comes out will taste just like what went in. At home my tap water tastes very good and is what I put in the tank. I use it to drink, cook, wash, etc. why wouldn't I, it's what comes out of my tap at home, and I don't use bottled water there. I do have a dual filter, sediment and carbon block, that I use elsewhere, primarily for taste. This is just my take, it is entirely each persons choice. I'd just rather spend my money on camping than waste it on bottled water.