Water that has a high saturation of dissolved minerals is classified as hard water. Most all water has some minerals in it, but water that's heavily saturated with them can be problematic for your home appliances, your skin and your hair. If you've never looked for hard water signs, you may not know what to look for. Read more to learn some of the ways you can check around your house for signs of hard water to see if you need a water softener installed in your home.