Do people put much thought into this? I usually drink tap water, rarely bottled water. I have a water filter at home for making pure water for my fish tank. I am considering using it to make drinking water. I’ve read there are trace chemicals in tap water which can affect your health. I live in the UK so the tap water is safe to drink unlike some countries. Maybe this is overkill but I’m trying to pay attention to what I put in my body.