Quick and Cheap Test for Hard Water

Hard water is not all bad. It can provide some health benefits by adding minerals to drinking water. However, those same minerals create a lot of cleaning issues for bathtub surfaces, shower heads, dishwashers, drains, and more. If this sounds familiar, here is a simple test to confirm you have hard water.
Fill a bottle with tap water about half full.
Add 10 drops of dishwashing liquid.
Shake the bottle vigorously. If the foam disappears quickly, then the water is most likely hard.

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