Hard water is water that contains high levels of minerals, primarily calcium and magnesium. These minerals are naturally found in the ground and can dissolve into water as it passes through soil and rock. Hard water is common in many areas and can affect household appliances, plumbing, and even skin and hair. When hard water is heated or evaporates, it can leave behind mineral deposits, often referred to as scale. This buildup can reduce the efficiency of appliances like water heaters and dishwashers, leading to increased energy costs and potential damage. Using a water softener can help reduce hardness by removing these minerals.