Do you boil water for mixing powdered formula?

I'm breastfeeding my 4 month old but will need to supplement with some formula next weekend. I have well water that is good to drink and I don't see why I would have to boil it before mixing with formula. It's not city water so there aren't any added chlorine or fluoride, and it's​ tested so no nitrates, bacteria, or anything... Curious what you folks think

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