What is hard water?
Hard water is water with a lot of calcium in it. This doesn't affect drinking water quality. When rainwater falls it’s natural soft but as the water flows over the land and filters through rocks, it picks up dissolved minerals, like calcium, and becomes harder. The more calcium water contains, the harder it is and the less it contains, the softer the water is.
How hard your water is depends on local geology and areas with lots of limestone or chalk have harder water, while places with granite or peat have softer water.
