Natural spring water?On well water with high iron and magnesium going through a softener. I use bottled spring water. At 50 to 75 cent a gallon, it's cheap.
Do you really believe it?
It is a marketing terminology
Do you believe that a mass produced bottled water can be sourced from mountain springs as shown on the bottles?
Regardless how your tap water tastes, it must contain chlorine, the best thing to do is to filter it.
I recently listened to a Professor of Enology from UC Davis where he was strongly recommending filtering the tap water with charcoal filters.