Common signs include: white or yellowish scale buildup on faucets and showerheads, declining water pressure over time, water heater making popping or rumbling sounds, dishes coming out cloudy from the dishwasher, dry or itchy skin after showering, and higher-than-expected energy bills. If you notice multiple signs, schedule a plumbing inspection with Kingdom Plumbing — we can assess your pipes, water heater, and fixtures and recommend the best course of action.