What is Hard Water?

Close-up of an old-fashioned metal faucet over a stainless steel sink, in front of a decorative blue and white tile backsplash with intricate patterns, showing subtle signs of hard water stains.

Hard water contains high levels of minerals, primarily calcium and magnesium, which can cause scale buildup in pipes and appliances, reduce soap efficiency, and dry out skin and hair. Recognizing hard water issues and using a water softener can help mitigate these problems.