Inside the fridge because it's frozen so it's hard. Lol
Ignore the retarded answer, some people are too stupid to understand things.
Difficult to say, but a few locations like Adelaide, in Australia and Regina, Canada have very hard water. But few of the hardest places are river streams in New Mexico, Kansas, Arizona, and southern California, Texas, USA
Hard water is water that has high mineral content Hard water is formed when water percolates through deposits of limestone and chalk which are largely made up of calcium and magnesium carbonates. Hard drinking water may have moderate health benefits, but can pose serious problems in industrial settings,