What Is Hard Water?

Do you notice spots on dishes, shower doors, or fixtures?

Hard water is water that has a high mineral content. It’s a natural result of minerals like calcium and magnesium accumulating during the water cycle, and it can happen with well water and even city water. The hardness of water is measured in grains per gallon (gpg). One grain is equivalent to 17.1 milligrams of calcium or magnesium dissolved in one liter of water. The more calcium and magnesium dissolved in the water, the harder the water becomes. This is why certain cities and counties within the same state can have varying degrees of water hardness.

The effects of hard water are fairly easy to spot: