We have extremely hard water. Although it's a pain to deal with and hard on our applicances, etc. Is it harmful? Should we be concerned about what is in the water making it so hard? We have tried all kinds of tricks. We use a Brita pitcher for our drinking water. We installed a salt free system (but I'm not sure I really think it makes a difference). We have had our water lines in our refrigerator/freezer lime completely shut. We change our refrigerator water filter almost every other month. That's expensive. I guess I'm mainly concerned about whether the water is harmful for us.