Our refrigerator has a (2 filter) water dispenser for both ice and water. Water is safe to drink and tastes delicious. We have another filtration system under our kitchen sink, so we can drink water from the tap and use it to cook with as well.
Some of our neighbors think the water quality around here is OK, but we disagree. Untreated, our water sometimes has too much chlorine and other times it smells swampy. I suspect it has a lot of bacteria.
Together the (micron) filters eliminate bacteria, heavy metals etc. and the carbon improves taste. The only negative is that they need to be replaced every four months, but still much easier than schlepping bottled water all the time. We spend about $180 yearly on filters, slightly more than what we would spend on bottled water, but that also pays for the water we use to cook with, rinse vegetables with, etc.