I totally agree about the plastic bottle situation. If the water tastes good, do tap and also use longer life plastics to refill. Our specific problem wasn’t that we didn’t trust the water. It was that our building was older and the pipes obviously old too. The water tasted disgusting and was cloudy. Solution was to invest in a water filtration system with carbon filter that you usually change only once per year. The difference is amazing in clarity as well as taste. I am an avid water consumer (7 liters per day) so it’s very important to me.