The high mineral content in hard water can cause scale buildup in pipes, faucets, and appliances. This reduces water flow, clogs plumbing, and decreases the efficiency and lifespan of water heaters, dishwashers, and washing machines. Hard water can lead to soap scum and residue on surfaces, leaving streaks on glassware, dishes, and fixtures. It also makes it harder to achieve a good lather when washing hands or hair, making them feel dry and dull. Hard water can also contribute to skin irritations, eczema, and dryness.