Here’s the good news: hard water won’t hurt your health. In fact, those extra minerals are technically good for your bones. You’re basically drinking a very weak, slightly crunchy version of mineral water.
Does it taste different? A little, maybe. Some say it has a "minerally" edge, like licking a penny. But most people get used to it and don’t notice. Your pipes notice, though. Oh, they notice.
But don’t worry about kidney stones or anything scary. The amount of calcium is tiny. You’d have to drink gallons of the stuff to have a problem. Your biggest risk is a grumpy coffee maker.