I live in an area with hard water. It may be better for your teeth and bones but it's not so kind on your household plumbing or your skin.
In summer I wear socks with mostly cotton content, and I have to say my feet don't like it. In winter I now wear socks with mostly natural wool or synthetic content and my feet are much happier.
I think the hard-water dries my feet out, and wearing cotton socks makes this much worse. When on holiday in areas with soft-water and wearing technical socks my feet are always happy.