Look at your faucets and showerheads. If you see a white, crusty buildup around the spouts, that’s limescale in its natural habitat. Check your kettle or coffee maker—if the bottom looks like a miniature limestone quarry, you have a hard water champion on your hands.
Even your washing machine isn’t safe. Hard water can cause detergent to leave a gray film on dark clothes, making them look faded and tired. Over time, it can clog the machine’s valves and reduce its lifespan by a few years. It’s the quiet ninja of home maintenance.
How to Test for Hard Water: The 5 Simple Steps