Hard water is not a health hazard. Drinking hard water does contribute a small amount of calcium and magnesium to the human body. However, hard water can be treated in many different ways including water softeners, electromagnetic water conditioners, and water filters.
Hard water can be treated, or softened. Its minerals can be removed by treating it with lime or by passing it over an ion exchange resin made up of complex sodium salts. Water flows over the resin surface, dissolving the sodium. The calcium and magnesium precipitate onto the resin surface. Sodium goes into the water, but the other positively charged ions stay with the resin. Very hard water will end up tasting saltier than water that had fewer dissolved minerals. Most of the ions have been removed in soft water, but sodium and various negatively charged ions still remain.
Magnetic water conditioners are permanently installed in plumbing systems to alter calcium ions, preventing them from causing lime scale. The water is good for drinking and keeps the calcium intact, which is good for diet.
Purchasing a water filter may be the easiest way to make sure your drinking water is free of minerals. There are portable water filters that can be used in water jugs. They are the simplest type of filter; however they have a short lifespan. Carbon water filters are built-in to the water supply in the house.